Don’t know anything about the location which of course is by far the biggest issue. Tunbridge well, 2700sq ft, £1m - I’m guessing it’s location isn’t that great.
As for the house itself, the view over the fields is the best bit. Not enough toilets/bathrooms for the number of people who can live in the house. Main objection, though, is that it doesn’t look like an easy house to live in. For example, the kitchen layout is all wrong for ease of actual cooking; kitchen has a door but is open at the other end so no way to keep cooking smells out; the rooms are difficult to furnish in a user-friendly way (TV askew on the wall, beds covering windows, random shower cubicle in a bedroom); carport only and that across the courtyard from the house; and so on and so forth. No single issue is a big deal. Put them together, that’s a lot of compromises for £1m. It’s a detached 4 bedroom house with a large garden a pretty long commute out of London. You can pay less for that.