Could be worth listing it on Autoscout24.ch for 15,000chf. It will save you the trip to the UK to sell it. The typical speed freak who would buy it is going to be less concerned about RHD than most drivers. Quite a few dealers on there sell write offs, and a conversion to LHD would be less costly, as it already has an MFK, and there is no shortage of LHD Astras in scrap yards for parts, it could make a nice project for someone.