Wirelessly posted (iPhone 3G: Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_2_1 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5)
There are a number of other similar posts since the snow chaos with the same issue. In my case it took almost a fortnight from booking to issue the e-ticket. I can only assume the rebooking and cancellations associated with the pre-Christmas week have had a knock on effect.