The money is similar to that paid at Turkish , which operates with EASA licensed captains.
Except at THY you will retain 95% of the Gross, at NAS LGW base around 52% ... Try renting a decent house/ flat near Gatwick for less than £1200 a month plus bills..as mentioned if you are retired on a FSP then it will work, or a young skipper with jet time, chomping to get a wide body command within 2/3 years. Another issue is security, with no "permanent contract" it is difficult to get mortgages and thus settle into a normal family life.. horses for courses!