Honeymoon from London in June for £6K? Any ideas?

Title says it all! We’d ideally like to be somewhere sunny and don’t want to go above 6K all in (B&B – ie excluding other meals/ drinks/ extra curricular plus flights). I think this limits us to Europe but open to any and all suggestions for a couple looking to lounge ☺️

ETA; up to £650 a night/ room if you want to recommend specific hotels.