Thanks Vince,
Seems that the main board uses RC5 code but the DVD currently doesn't and therefore ignores the RCU in DVD mode - Work in progress to find a suitable RCU and flip it to RC5 - Gather current code is NEC whatever that is - Will search out NEC codes on my programmable RCU tomorrow - Chris.
PS - Have found programmable remotes useless as they only give codes for RCU available from the Flea or Wiltsgrove. The odd ones needed are never there, no matter how many times one downloads 'updates'
Later - Got NEC code Toshiba RC1911 RCU from Wiltsgrove and flipped DVD back to RC5 code - no probs.