Thanks for those UEA and Dancesport photos, a quick google will give a UEA Dancesport facebook page (no link, just do a quick search) where the calendar ladies are all shown fully dressed, but in nice colour! It seems that the shots are random, the couples do not seem to be 'partners' in life or even dance!
That large guy seemed to get in all the best shots, I wonder if he might be gay? I could see the girls being much happier posing like that with him if he was! If not.....I must investigate this ballroom dancing lark!