BOAC,
Can anyone suggest a pay-as-you go SIM card that would include data?
In the UK, look at 3. They do one that comes with 1GB (which you can then top up).
Many crew members DO arrive at unsocial hours unlike office wallahs - and this is an aviation website, is it not?
Yes, but surely if you want roaming data and can't claim it on expenses, there are many more financially suitable ways to get yourself onto the interweb than paying expensive mobile data charges (particularly on PAYG where you will be charged a premium).