Yes and did a couple of months ago DME-LHR-JFK.

Bought WTP GUF2 to J. quite an interesting upgrade as there was no WTP on any flights to DME as for a three month period the 787’s were off.

Agent priced a WT ticket DME to LHR and WTP to JFK and vice versa. Then the upgrade went straight to J.

i re-priced another just after the 787/777’s we’re back and it was more expensive being WTP all the way as a base fair.

have the same on our winter trip to Miami as it’s a Mis Haul and it seems to price lower