Hi guys - I can't speak for Gatwick, Manchester etc but I used to fly for Airtours in Belfast, and my ex-colleagues are now dual rated on the A320 and A330, thus operating mainly short-haul in the winter, and short-haul plus Floridas in the summer. They often operate W patterns out of BFS - to Sanford, and returning to another UK base, before positioning home. I guess most bases would be the same - I'm sure Glasgow were similar.