Originally Posted by
LondonElite
Which are the separate tickets? LHR-Spain? In that case, don't you fall foul of UK travel restrictions, even if you manage to stay airside?
BOM-LHR is one and LHR-LPA will be separate, possibly via MAD. But in any case, UK is perfectly happy with connection on separate tickets, including landside transfer with overnight stay (and not just of 1 night) provided self isolation is maintained during the time spent in uk.