The return of pre-departure Covid exams for travellers to the UK will come into drive on Tuesday. Winter bookings especially are slowing down as Omicron variant spreads, holiday giant says. Some researchers have criticized the prevailing leisure constraints model, supporting the view that leisure participation is not via complete absence but via active negotiation amongst constraint factors. Maybe you want a job which provides you an adrenaline rush, or a minimum of brings you in shut proximity to others pushing the boundaries? If that’s…