Only if you are really selective about wanting to live in the
expensive leafy green areas. There are plenty of "leafy green" parts of Croydon, for example, where prices for a 2 bed is more in the 800-1000/month range.
1400/month will give you a large house with a garden many places here.
Heck, if I could get 1400/month to rent out my 3 bedroom house with a garden, I'd have enough left after paying my mortgage to rent a 2 bed flat nearby (though that admittedly is because I struck it lucky with a very favorable tracker mortgage).