Beckenham ?
Friendly village-like atmosphere. Lots of parks / green space.
http://en.wikipedia.org/wiki/Beckenham
a 15-20min train ride into Cannon Street, which is 5min walk from Threadneedle Street.
2 bed apartment about £850-£1000.
http://www.findaproperty.com/to-rent...&maxprice=1000
There's a reasonable sized Filipino community there .... my wife & I know at least 16-20.