Changes

|status = Operational, based on Chinnor & Princes Risborough Railway

'''Clayton Class 17 D8568 ''' is the only surviving example of the Clayton Type 1s which numbered 117 in total. The locomotive is based at the Chinnor & Princes Risborough Railway and is used during the running season and at special events. It is owned by the [[Diesel Traction Group]]. It was [[Diesel Locomotives hired by the SVR|hired by the SVR]] from May to September 2017 and has also attended a number of [[Diesel Locomotives visiting the SVR for galas|Diesel galas]].

It was [[Diesel Locomotives hired == D8568 in BR service ==Intended by British Railways as the SVR|hired by standard Type 1 for the railway system, supplanting the EE type 1 (later class 20), poor reliability meant withdrawals began as early as 1968, when some members were just four years old. Although the SVR]] from May to September 2017 and attended that year's Class was allocated a [[Diesel Locomotives visiting the SVR for galasTOPS codes|Diesel galaTOPS code]], having previously visited in 1998 and 2015. A further visit is announced none of the locomotives survived long enough for 2019renumbering.

Intended by British Railways as All but two of the standard Type 1 for the railway system, supplanting the EE type 1 (later class 20), poor reliability meant withdrawals began as early as 1968, when some members were just four years old. Although the Class was allocated a [[TOPS codes|TOPS code]], none fitted with pairs of the locomotives survived long enough 450hp Paxman 6ZHXL 6-cylinder horizontal engines designed for remumbering(but never used in) in railcars. Two Three variations of the class were built:

The Class was equipped for multiple working with 'Red Diamond' and (Class 17/3: 'Blue Star' ) locomotives respectively. Although D8568 is the unique survivor one of each sub-class 17/1 (8521 ) and 17/3 (8598 respectively) survived into BR Departmental service at Derby Research Centre until 1978.<ref>[https://www.railuk.info/diesel/getclass.php?id=69 Railuk.info] (Retrieved 4 August 2019)</ref>

== D8568 in BR service ==The loco spent all of its working life in Scotland where it was delivered on the 16th 6 January 1964, to Haymarket, near Edinburgh, moving to Polmadie, near Glasgow during on 28 September 1968. It remained operating at this depot until it was withdrawn from service on 6 October 1971.<ref>[http://www.brdatabase.info/locoqry.php?action=class&id=17&type=D&page=alloc BR database] (Reterieved 4 August 2019)</ref>

Sold from Polmadie, D8568 went to Hemelite of Harpenden, a cement company on the former branch line between Harpenden and Hemel Hempstead. It arrived under its own power on 11 September 1972, to became become the first 'privately owned' ex-main line diesel loco to break the 'no private diesels BR ban'.

Purchased by the DTG it left Clitheroe on 9 February 1983 for the North Yorkshire Moors Railway, returning to traffic 22 April 1989. On 25 April 1992 it arrived at its present home on the Chinnor and Princes Risborough Railway. As it is owned by the Diesel Traction Group, which has other locomotives based on the SVR, it has been a visitor for [[Diesel Locomotives visiting the SVR for galas|galas]], first in 1998 and several times from 2015. It also may visit for repairs, and visited from 2020 to 2022 for repaint into BR blue livery, bodywork attention and work on the Paxman engines<ref>[https://www.svrlive.com/blsep20 Branch Lines newsletter, September 2020] (Retrieved 29 August 2020)</ref>.<gallery mode=packed heights=200px style="text-align:left">D8568_20150930.jpg|D8568 passing Highley, September 2015D8568_20210813.jpg|D8568 repainted in BR blue livery, August 2021</gallery>

*[[Diesel Locomotives visiting the SVR for galas]]<br>*[[Diesel Locomotives hired by the SVR]]

*[http://www.westernchampion.co.uk/loco-d8568.php DTG web site]<br>*[https://en.wikipedia.org/wiki/British_Rail_Class_17 Class 17 on Wikipedia]