73 136 prior to GBRf ownership in use by Transmart trains
73 (209)  961          73 (204) 962          73 (206)963        73 (205) 964        73 (208)  965
                                                                                                                                 
Due to restricted clearance on the Moorgate Lines between Kentish Town Jcn & Farringdon (route boundary) MCL'Midland City Lines' only diesel locomotives of class 31 (all sub classes),33/2 only (33/0,33/1 prohibited) and Electro Diesel locomotives of class 73 (all sub classes) are allowed on the route with the following restrictions:
15 mph maximum speed,OHLE must be isolated   (but not earthed 10/2016).
Locomotives must not stand under insulators positioned directly above the track as the exhaust can damage the OverHead Line Equipment
class 73s are prohibited in DC mode (even though DC rails are Kent side of route boundary!)
* 
"The Locomotive Route Availability must not exceed the Route Availability of the Line"
RA=Route Availability / permissible speed  -(weight per axle of the locomotive) which is RA 5 for the MCL route

In 2017 further restrictions apply  only class 73 allowed due to height issues 12'6"
correct to Feb 2023
 107              109             119            128            136             141              201              212             213
31 465 'upstairs' at St Pancras
Class 31 
465 NR

  
136 repainted now in GBRf ownership
73 136 at Cricklewood
73109 at Cricklewood
73 207 at Mill Hill Broadway
73 141 at Mill Hill Broadway
  73 (104)   951        73 211      (952)    .
Locomotive Fleet
Track diagrams Bedford Midland to London St Pancras
 (note line speed improvements on fast lines: higher line speeds not shown)
For reference only *NOT* to be used for work planning- correct to Dec 2014,
​Class 33/2
207 wcrc
Class 73
 138 NR
converted but un numbered April 2015
2016 layout
73 961 mtu power
73 963 mtu power
Due to restricted clearance, only certain types of locomotives are allowed on the 'core' route between Kentish Town & Blackfriars, most popular are the class 73 electro diesels working in diesel mode .
Caledonian Sleeper in Scotland also has
73 966 (73 005)
73 967 (73 006)
73 968 (73 117)
73 969 (73 105)
73 970 (73 103)
73 971 (73 207)
73 139 at RVEL Derby July 2016
t Acton Central 8/9/16
73 964 at St Pancras LOW LEVEL 04 12 2016
hEADCORN STATION - ONE OF EACH!
952 leads 951 through Elstree
101 at Derby
           101                       134                        139.