JER-LHR-HEL-JFK-LAX-LAS on the outward
SFO-JFK-LHR-MAN on the return

£2030 return (plus the hotels and car rental) for 1520 TPs, as I managed to get the lady to book it all with BA flight numbers so it qualifies for the BAH offer.

Unfortunately for my Avios balance, some of the short haul sectors have been booked in I class, even though I could see that the fare should have been bookable in J class; the lady said she couldn't book those in J. I've been booked in a weird and wonderful assortment of R, I, D and in fact J for one of the transcon flights. But overall it looks like I'll get around 40,000 Avios, which isn't too shabby!