David, I think it was mainly "territorial". Although the driving style as you quite correctly point out was totally different to anything "SR", the DMMUs were seen very much as "foreign" motive power and if I remember rightly, the Redhill drivers didn't want the DMMU diagrams in the first place. Bizarrely, most of the drivers didn't mind heading east from Redhill as much as heading west. Again, I think it was purely a "territory" thing. As for the driving style, I doubt the Redhill drivers were using an EMU driving style as Redhill, like Norwood, was a mixed traction depot and a lot of the older drivers had no knowledge of EMUs, only diesels, EDs, DMUs, DEMUs and DMMUs. At the time, to drive EMUs on the Brighton line, your depot would have been either Victoria, London Bridge, Selhurst, Three Bridges or Brighton. It wasn't until the very late 80s, early 90s that I did a conversion from diesel to electric. Prior to that, my only traction knowledge was 09s, 33s, 47s and 73s. In time, we all became EMU drivers! My final tally included 319, 455 and 456 as well as slam door stock. I remember some of the Norwood diagrams taking me to North Pole Junction with the Brighton-Manchester stock on a "47" and with a Crompton to Ripple Lane, Willesden and Acton with a variety of freight and it is a little disconcerting to be away from your home region. Other regions do things differently and you're simply outside of your comfort zone. Fond memories of finding myself in Old Oak Common drivers mess room one day. The Western region drivers would have been more hospitable had an alien landed next to the tea urn...