Thank you all for the info. And spotwelder thanks for the offer - although considering it will be mrs alect and mini-alect I don't fancy imposing that on anyone.......
christep has advised that LHR-VCE can be used on the LGW-VCE without re-issue - anyone had experience with similar situation?
If faced with LHR-LGW transfer (both ways) cf. re-issue what would you chose?