There's not too much details on this offer, but STA are currently advertising flights to New york from London for £199. Not available online, you need to call them on 0871 230 0040. See link for details, also Cairo for £229 and some others.
Could use £20 off voucher as well, quote DMH and say you have a Barry the Ant card when booking.
£179 to NYC - Bargain!