Permafrost_ATPL
I had similar thoughts but then sensibly came to this conclusion: it's a short-term decision if you go with a LH offer just because it's LH. I know, you can have a very nice lifestyle part-time LHS with EZY (despite what people say, there is some terrible rostering but BA guys are working just as hard with 6 days on in a row - it becomes what you can make of the options available). Not only could you be reassigned SH (debate likelihood elsewhere) but in a few years those who joined on SH and are transferring to LH will still have seniority over you. Joining BA is a full career move and you're better off in the longer term (and at the end of your career) getting in early on SH. That way you will retire with higher seniority and that means better lifestyle. Patience is a virtue - annoyingly. Best of luck.