I've been looking at flights from LON to SEA (stopovers or direct, any LON airport, any carrier) and back for later this year and have run into a slight problem. The tickets originating in the UK are twice the price of those originating in the USA. The price of the tickets in general is not a problem, but the disparity in prices has me stumped. British Airways tell me that it's either a) the exchange rate (absolute rubbish), b) Prices are set by some shadowy government organisation and they have no choice (sure) c) They can't compete with subsidised US carriers so have to drop their prices (odd, considering AA have the same price differential and say similar things).

My question is, is there any way to circumvent this awful situation or am I going to have to suck it up and pay the price they quote on the web?