Tom8400 i shut mine in for 36 hours. It showered on n off over those days but was also mild and cloudy at times. Theyve all moved well and were out orientating today as it was sunny. Id say there were at the most 20 returnees to old position but when it clouded over disappeared.
I cant honestly think that closing my entrances( the smallest bar setting) up at this time of year when 1cm below is an omf made any difference to ventilation. Its mid winter and although dorset fares well weather wise, its not been above 12c at best on the odd sunny afternoon. Theyve survived and are much more hardy than some on here have feared. Thanks for all advice. I always read all, have a think and go with my gut. At some point you have to start making your own prudent choices.