I got the same email about Jet Time but when I checked my booking online both flights still saw BA, and they are not in the list above. They are BA1435 on a Monday and the BA1438 on a Sunday.
Does anyone know what happens to pre-booked seat allocations in this situation? The seats were booked on a B767 but that will have to change if Jet Time are operating them.
Not too bothered, just curious.