757 or 767

travelling on the 28th gatwick to turin with Thomascook, was thinking flight would be on a 757, but had a look on Jetphotos yesterday and noticed some week the charter had been done by a 767 of Thomascook, with this being the start of the easter rush of skiing holiday and the Manchester and Birmingham flights being cancelled, wondered if anyone know if a 767 will be on the route that weekend or again on April 4th
thanks