It seems like the intention is to live a "London" life for a year or so....and it might be worth considering what that entails... it could be long commutes on the tube train most days and weekends doing the same to get to Central London attractions... or its about living somewhere close to work (walk/ bus) and easy access to good events/ pubs/ clubs etc.
I am not to date with the up and coming clubs and pubs across London, all I know is that my 20 year old son would be pretty p'eed off if I moved out of Camden...and its easy access to Regents' Park, Camden pubs/ clubs and events (as well as his mates). All within safe walking distance. Access to work down on New Oxford Street was brilliant.. buses, tube or cycle and walk all possible depending on the day etc. Some areas are very good, others less so; getting to visit is helpful as everyone's views are different.
Just had a quick look on Zoopla for what is rented around here within the sort of budget mentioned.... and three people, for example:
https://www.zoopla.co.uk/to-rent/detail ... 686437c54f
Its on a pretty decent street..... close to tube stations and right next to a load of bus routes. Easy to get to a few good pubs; well my view of decent pubs and the market/ canalside stuff. There are parts of Camden/ Kentish Town etc that are more than sketchy.... and parts that are so nice as to be a caricature of London life.
For me living in London has always been about quick and easy travel to work/ fun etc. Spending time commuting always felt so wasteful and never felt I "got back" that time/ quality of life by living somewhere larger/ nicer and further out at weekends. I've lived here for the last 20 odd years and those factors are still very valid and to me necessary. The location means I can be in Central London in 20mins or out in the countryside in an hour or 10 mins to a park.
Worked on a project in Shepherds' Bush aimed at exactly at the market you are looking at.... young people wanting to flat share and enjoy the London life. And it's weakness was the distance to Central London.... walking there is pretty much a no-no, as was (is?) cycling for most. So buses and tube. The impact of Westfield and its enlargement were massive, prices going up quickly, pubs and clubs evolving to become more mainstream (bland....) and expensive because they could do so... a captive market so to speak. It didn't get off the ground as by the time it would have been built the target market would have been priced out of the local facilities... shame. Had to look at the "Parental Bank" market instead.