I've taken one on a 'normal' bus from Sheff station to Hope before. It was a replacement service for cancelled trains. On the way out it was a standard shortish regular bus. Sat with it in the buggy zone, driver was fine. On the way back, *covered* in mud and asstd. farmyard filth, there was a coach. The driver wasn't too enthusiastic but after some negotiation I got on (bike in luggage space and I was made to take off my outer layer and put it in there too).
There were some v.amused Japanese and Italian tourists just come from Manc Airport photographing my partial strip. There must also have been some confused relatives when the slideshows started with a muddy Brit in a car park stripping down to his liners in the rain…