Thanks for the feedback everyone - I certainly need to double check some of the information I have as it doesn't seem to corroborate with what some of you are suggesting. I guess this is quite normal when information is passed on from different family members and over such long periods of time.
ADM199 your post is interesting as it's the first 'real potential' details of a possible ID - where did you manage to obtain this? Are the numbers the soldiers ID numbers or a seperate POW number given to them when captured? Bertie's middle name was John, so whether this was used to replace his first name of Robert, I do not know?
Scouseboy - thanks for coming back again - he was definitely Scots Guards.
IMBER - Thanks, I will verify this again as it's quite possible the info I have is wrong.
This certainly gets the adrenalin going - I will update with any new info - thanks for your help....keep it coming!
Many Thanks.
DPT