Guys, if you're planning on commuting whilst on shorthaul you do need to bear in mind that although possible, it can be pretty tough - yes we do have a bidding system where you can request trips & days off BUT it may not always work ; you need to bear in mind that it is entirely possible (and likely, to be honest) that you will be rostered a whole week of 'there&backs' (no nightstops). Occasionally, despite requesting it, you may not get any trips at all.
There are a lot of nice trips knocking about (we nightstop pretty much everywhere on Eurofleet LHR/LGW, with exceptions) but there are many more crew than trips available as I'm sure you'll appreciate...another thing to bear in mind is that due to union rules mandating a minimum amount of 'rest' between flights, you may find that if you're delayed on a LHR-CDG-LHR flight, the onward 'link' flight to your nightstop (LHR-LIS, for instance) may get re-allocated to another crew. This means you're off the trip, and sometimes off the entire 3-day trip; please bear these things in mind.
I'm not discouraging commuting since many on shorthaul do so, you just need to be made aware of these potential problems.