The schedule will be:
Thurs 2nd is reg/measurement - but could easily go out for a sail as well
Fri 3rd preworlds & uk nationals day 1 - probably 3 races
Sat 4th preworlds & uk nationals day 2 probably 3 races
Sunday reg and measurement/rest day/could go sailing - you only measure in once
Monday-Saturday 5 days of racing with a reserve/lay day in the middle somewhere
Saturday Night - prizegiving party