I spoke to Jeremy Townsend (then RS marketing manager)when he was mooching around my 5 at a show years ago and he confirmed that there was never any record kept of Trophy number against chases number, they simply didn't know.
As per Chris above there is a small rubber egg shaped gasket between the upper inlet and the top of the engine, just a clean should be enough and there is a gasket between the upper and lower gasket, I should have the part number at home but it is readily available from Renault parts direct.
The Brexit vote has f*$ked up pretty much everything, some would argue temporarily I think something akin to turkeys voting for Christmas but at some point things will stabilise. It's a talking point. but it only really effects those wishing to buy - good news and those wishing to sell - bad news.