(ShareCast News) - Self storage group Big Yellow said said third quarter revenues were up 21% to £25.7m.On a like-for-like basis over the quarter, year on year revenue growth of 10% to £22.3m was slightly ahead of the first half of the year. Guidance for the full year remained in line with current consensus, the company said."Whilst it is early in the quarter, we have had a positive start to January with an improving book of reservations and look forward to delivering occupancy growth over this quarter and continuing into our seasonally stronger spring and summer trading period," said chief executive James Gibson.