We just used to use 2 single ones and zip them together so that one was on top and was underneath ,we found it fine ,didnt get tangled and we were greatful of the extra layer :)
I use two flannelette double sheets, stitched together along the bottom and halfway up each side. They make a brilliant liner and are very cosy. The children have single sheets folded in half and stitched, but they don't work as well and they do get tangled in them.
A day of all things motorhome and campervan. The show is held both in the main indoor arena and across the grounds. Catering, hot drinks and food options are available. Easy access to the site and free parking included. Win one of five pairs of day tickets