Thomson airways Select a seat

[Day Dreamer]

Hi I wondered if any one had used Thomson/First choice to fly to Sanford, I wanted to be able to book my actual seat number has any one done this? If so when can it be done and anyone have a contact number? I keep getting mixed messages as I actually booked through First Choice but am going on a Thomson plane and Thomson brochure advertises the Select a seat option but First Choice doesnt.
Thanks

[ElinJ1987]

Go on the Thompson website, there's a number to call to book a seat on long haul flights from £6 a seat though. You need to ring to see if it is eligible with your flight.