Wow, thanks for that.
Another question, about the HEP sockets under the buffers. I know 201-205 and 210-214 can't work push pulls because of their buffers and can't be fitted with a drophead coupler. I know that 210 carried out static HEP tests with Mks 3. 201 and 210 from what I can see have different HEP sockets to all the other 201s. Was this another modification and was not applied to these locos. From what I have read not all 201s had their HEP equipment commissioned, even the ones that have no reason to use it and that currently in 209 and 234 it's not working at all.
Also since the DD stock entered service all the push pull 201s seem to have been turned the same way. The No1 end is always facing Belfast or Cork. In 1994-1996 most of the 201s working the Mk3 PP sets had their No1 ends facing the coaching stock. From what I can tell the No1 end cab is bigger os it it just for driver comfort that the 201s were all turned this way seeing as it would be the No1 cab in use most of the time unless the loco is being swapped out?