" Because my flight from edi I booked extra legroom in row 11. I had a look on the Thomson website and my flight and lots of others are selling both extra space and extra legroom seats from edi. As far as I know only the 757 has extra legroom seats (34 inch seat pitch) and extra space seats. The 737 only has extra space seats."
This should be no indication of whether or not the flights are operated by a 737 or 757. Thomson do now offer the extra legroom seats on their 737-800s both adjacent to the overwing exits with restrictions and on selected rows towards the front of the aircraft to all customers to including children etc.