Wow! It seems I have opened Pandora's Box with this one.
@ Kevin - I will get around to sending you my list ASAP. I need to go through it and extract the definite UK specific words, and there are a few names and places that got in there early on. I now have two separate user dictionaries for those.
@ BetterRed I have to disagree with you on airplane/aeroplane one as one who lives in the UK close to a major airport everyone I know uses airplane in common speech.
@ Tex2002ans - I will upload the text files to my Google drive account and post the link here for everyone to take a look at. As for 'Egyptologist', I think you will find that this is not as rare as SCOWL suggests. A Internet search brings up numerous links to its usage - there are even academists who refer to themselves as Egyptologists.