Hi Steve,
It was I guess the original gasket pretty much burnt away at the top corner. As a bit of preventative treatment I replaced the water pump with a new one whilist I was in there although the existing pump and gasket were doing OK. Bled system OK and now zero gurgling ! I'm keeping a eye on a small leak on the radiator itself but otherwise all OK
French plates finally came through on Monday having gone through a few hoops (certificate of conformity, french MOT, customs exemption, etc.) I spoke to the DVLA last week regarding the V5 to make sure the transfer of ownership was going to be recorded OK. I've already sent off the export slip and with a covering note + photocopy of rest of V5 direct to them. The French admin can be fussy if they don't have full documents for an import so that's why I preferred to bring back the whole logbook. I'll post tax disc back to Paul today to see if he can cash in the remaining months for you.
cheers
Nick