Slightly OT, but a good way to clock up some TPs on the cheap!
In an attempt to help out with this
http://www.flyertalk.com/forum/showthread.php?t=662077 thread, I popped the dates into
www.otc-uk.co.uk.
Nothing came back on BA, but they're offering return flights on Aer Lingus LHR-DUB-LAX, Y on the short hop, J (D) on the long one, for
£439.90, including two nights in a dodgy motel. (For an extra £20, you can get the 4 points at the airport...)
That looks to me like cracking TP value for an itin starting in the UK. Furthermore, because it's showing as Y class on the LHR-DUB legs, it might be another 40TPs to add into the equation.
Obviously the downside is that you're flying EI, but might be of use to some. Just think, you could spend that 48hrs in LAX doing a Y-UP run...
Dates look limited, but March 12-17 worked, as did March 12-14. I checked BOS & NYC too, but no joy there.
Edited to add - I got through to the credit card screen and it's re-priced to £486. Also worth noting that you'd get >15,000 miles for the trip too...