Gateshead College does the Northumbria accredited Access course doesn't it? I am doing the same access course at a college in Cumbria. If you were doing the same modules as I am this year, you would have missed a vital part of the Unit 2 Psychology Study, the Unit 2 Chemistry practical and the Unit 2 Biology practical, which were all in the week after half term (with the psychology study also being the week before half term too!)
Unless you absolutely have to go to Thailand, I would give it a miss. A girl on our course went to Australia for 2wks after the Xmas holidays; she found it an utter struggle to catch-up and ended up dropping out.