Hi here is a list of class 50,s which have been allocated to NSE including detail differences could be useful if you model in 4mm or mad enough to do 2mm!! 50001 Std Large Logo/ RNSE Light , NSE flashes on headcode boxes roof pods 50002 Onse (Doncaster)roof pods,NSE flashes on headcode box crests/RNSE Dark,roof pods, NSE flashes on headcode box, West of England badge (no crests) 50003 RNSE Light NSE flashes on headcode box,roof pods 50005 RNSE Light with crests roof pods,RNSE dark Unbranded