This modern 2 bedroom apartment is in prime rental territory, being on The Village, just off Writtle Road and looks to be a good example of an apartment within this area. They rent really easily in this location and get snapped up as soon as they come to market.
http://www.rightmove.co.uk/property-for-sale/property-54355286.html
Similar properties to this, rent in the region of £775 pcm. The asking price of this apartment is £175,000, therefore you could be looking at a potential annual return of 5.3% (before any service charges/ground rents)
If you would like to pick my brain about where the good areas are for buying to let, feel free to pop in for a chat.