Not wishing to rain on Stable's parade, but the chance of getting one of the commuter lines (4 x 5-day tours) as a junior Airbus FO are nil; I should know, I bid for them! You'll need to factor in nights at LHR between trips, but still possible to block your work to achieve this. PLenty of guys rnt a commuter room for a couple of hundred quid a month to cover those night stops.
Perfectly do-able, but be aware that it'll not be as simple as suggested.