The last design of coach to be considered in this series of articles is the British Railways standard Mark I, which was produced in two styles, the (mostly shorter) non-corridor version, and the more numerous, longer, corridor type. The corridor coaches appeared in earlier and later forms, the latter being distinguished by external aluminium window frames, and better anti-corrosion treatment.
The Bluebell's first Mk.I coaches were the three 1950s' ex-King's Cross suburban non-corridors which carried many of our passengers in the 1970s. This allowed the Carriage & Wagon department to concentrate on the overhauls of our older Maunsell and Bulleid stock. However, by the early '80s they were showing their age. With the main weakness in Mk.I design being the door and door-frame structure, the maintenance of such coaches with many doors (and small, leaky, windows) per side was found to be beyond our ability. Their earlier design of windows also left much to be desired. (See article in Bluebell News Vol 28 No 3.) These three coaches were sold in 1986, and we should congratulate the North Tyneside Railway, since the recent restoration to traffic of CL No 43010 means that they have now completed the overhaul of all three of these coaches.
Having learnt the hard lessons of the shortcomings in the earlier Mk.I designs, our subsequent Mk.I acquisitions have been of early 1960s build, with the improved windows and mainly with cast aluminium doors. The first to arrive was Buffet car No.1818, entering service in 1984 after an internal renovation and a repaint. Others followed, in particular more catering vehicles, two CKs (composite corridors) and three SKs (second corridors) to relieve the weary Bulleid stock. Then, in 1993, came the biggest influx, when the travelling college train was purchased complete. Apart from providing three TSOs (tourist open seconds), many of the vehicles of this train were intended to be broken up for spare parts, but it now appears that a few will also remain in various functions on the railway, with others sold on to other organisations.
The continued operation of any Mk.I coach is only possible if it is overhauled and maintained in a watertight and corrosion-free condition. To secure the long term future of a Mk.I coach thus requires considerable preventative maintenance, with the accent on preventing water penetration. Failure to do this results in progressively advancing corrosion, which becomes more difficult to repair the longer it is left.
For example, Buffet car No.1818, having operated for nine years, then required structural repairs to its door pillars. On its initial restoration to traffic a substandard previous repair had gone unnoticed, allowing water penetration behind the gutter which caused serious structural corrosion. Another decade on, and the vehicle, having been in use on the Bluebell for 20 years, was 45 years old, and in need of major structual repairs at its ends and roof, which it received in 2005/6.
Corridor Second No.25728, which on arrival was thought to be the best of the three SKs has, in the intervening three years, demonstrated another weak-spot in the design. The seal between the gangway and the end of the coach had failed, leading to corrosion of the end sheeting and the subsequent ingress of water. The end-loading pillars, quarter-inch thick steel channels, had rusted almost completely through at the bottom. To gain access to repair these required not only the partial dismantling of the coach interior (including a section of the floor, which was, as usual, partly rotten in any case), but also the removal of the gangway connectors. This, together with the attendant sheet-metal repairs and renewed woodwork, added up to a fiddly and time-consuming (18 month) job.
Other weak-spots that have been identified include the top corners at the ends, and the gutters, particularly of the Derby-built coaches, where, as with the gangways, poor quality sealant leads to water ingress and corrosion. It becomes important to remove and re-bed the gutters and window frames if it becomes evident that the rivets or sealant have failed. It is, however, the condition of the door pillars which is the limiting factor on safety grounds, and will, if corrosion is unchecked, lead to the demise of any Mk 1 coach. One only had to look at the Queen of Scots coaches, towards the end of their loan to the Bluebell, to see this!
Without an increase in the resources of the C&W, we estimated that we shall be able to maintain no more than 7 or 8 Mk 1s in traffic in the medium/long term, on the basis of each one requiring major work each decade. We are now fortunate in having been able to improve facilities and our skill base in this area.
During 2008 it started to become apparent that these 55-year-old carriages were starting to suffer from a breakdown of the insulation resistance of their wiring, and electrical work is now required on many of the vehicles. It has to be remembered that this work was no-where near being required when the first overhauls were undertaken on carriages which were then only 25 years old back in the 1980s.
Restaurant Miniature Buffets (RMBs) Nos 1818 (green) and 1838 (maroon until 2002, now green). Both have now received structural repair work in door pillar areas, and further major repairs at the ends (which 1838 received at the toilet end in late 2002, and 1818 in 2005). Both bar areas have been completely modernised in line with our operational needs and the latest hygiene requirements. Otherwise, the interiors have been restored as far as practical to their 1960's condition, involving, in the case of No 1838, a "de-furbishment". (Bluebell News Vol 27 No 2 and within the C&W report of Vol 35 No 1.)
SK No 18752 (NSE livery) was used in the relief set. As the only one of the three SKs (corridor seconds) not to have received a structural overhaul, it has been rendered surplus by the arrival of the Ex-Travelling College open seconds, and was sold in 1995.
Another SK (No 24458) was obtained in 2007. This is in relatively poor condition, and will require extensive repairs both to structure and interior before it can be used, but is now expected to be disposed of.
The third, No 4921, had a seating bay removed to accommodate a photocopier. Restoration for passenger use took a protracted time, and with our Bulleid and Maunsell Open Thirds able to satisfy our requirement for this type of vehicle in the longer term, following the conversion of 5034 (below), the vehicle was sold in November 2000. The other two had a few years left in them before the crunch arrived, when 4957 required structural repairs. In addition to door-pillar repairs, full end overhauls, requiring removal of the gangways, were necessary. In addition a section of bodyside was cut out and replaced, making good some longstanding accident damage which had never been properly repaired on BR. The interior though remains largely in its converted Travelling College condition, with an extra partition.
Two other ex-Travelling College coaches were repainted in Pullman colours, in BR Western Region style, to work with our Pullmans. Both had steam heating reinstated. The body condition of these coaches was otherwise as would be expected of any thirty-four year-old vehicle. The former BCK was used as the guard's brake vehicle for our Golden Arrow train. With the entry into traffic of the LMS six-wheeled guard's van, it was released from this duty, and sold. TCL99168 was repainted as W25778, the "New Century Lounge". It proved popular with parties but it was difficult to find a use for the small saloon, which, although occupying nearly half the coach, was too narrow. This coach has also now been sold to another railway, who have now sold it on to a third, and it has now ended up having been converted into luxury holiday accommodation attached to an old railway station.
The ex-Travelling College staff coach found ready use as the replacement dormitory coach at Sheffield Park, although it has already demonstrated that a coat of paint will not prevent the gutter or windows leaking. Of the six student dormitories, one has been stripped internally (TCL99161, ex SK 25871) and replaced the Maunsell nondescript brake as the Horsted Keynes Carriage Book-shop, four (TCL 99160, 162, 163 and 164) have been sold (without their Commonwealth bogies which we are retaining as spares) and the sixth (TCL 99165, former TSO 5034) has been rebuilt as special use saloon, with one end restored to its original TSO layout, with double-doors and a wheelchair lift fitted at the other end, giving wheel-chair access to a multi-use open saloon. The structural bodywork of this vehicle was considered to be in better condition than the three other Mk.1 TSOs. 4941 may be similarly converted in the future.
Whilst some are undoubtedly to remain serviceable in the long term, it is to be hoped that some, whilst helping cope with the immediate demands of an extended railway, will in the longer term be replaced by restored Bulleid and Maunsell stock.
On to the final article in the series, in either its original form or as now updated.
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