I can't be bothered to search for a council tax statement but you're probably right about that, I wouldn't have noticed. However London Borough of Bromley is correct
http://www.bromley.gov.uk/
Nobody, apart from you, wants to call it a "London" Borough. Each and every town, and village, and some hamlets, have their own sign, all of which include the Horse of Kent. The "official" coat of arms of your "London" Borough are featured only on the wall of the Civic Centre, and I doubt if anybody who does not work there could even tell you what the wretched thing actually looks like.
Some of Bromley is in the green belt, not where I live.
There is still an open field farm within the town boundaries, let alone the borough, 54 % of which is open space. As far as I am concerned, the likes of Beckenham town centre, & Penge High Street are not in Bromley they are separate towns.
What on earth is wrong with being part of London and why such a chip about it? I've assumed, from things you've said, you're about same age as me and I've never known anyone my age or younger who doesn't think Bromley is part of London and who isn't glad of it!
Few have ever claimed that Bromley, Kent is "London", anybody with half a brain knows that Bromley, London, is Bromley by Bow.
I have never met anybody my age or younger who does not consider Bromley, Kent, to be suburban Kent, and not "London", and who does not find the description "Londoner" when applied to them to be anything other than insulting. If you go to Woolwich & call yourself a "Londoner" they will fall over with laughter at your expense.
Whatever you call Bromley, it's not rural countryside. Downe is only just over 14 miles to Charing Cross in central London. It takes from 17mins (fast train) to 25minutes stopping at different stations, to travel from Bromley South to Victoria Station. The reason many people like living here is because of close proximity to town and ease of travel.
I don't think anybody would claim the Medway Towns to be rural countryside, but nobody claims them to anything other than Kent. Train times mean nothing, it can take just as long to get into London (real London that is) from Bromley North as it does from Sevenoaks.
However this thread was about the Dartford toll tunnel and Dartford is in Borough of Dartford, an
English non-metropolitan district. Dartford people are far from rural.
So you think that they are "Londoners" too? FTR If you want to put on your pearly queen outfit & walk down Jail Lane, Biggin Hill, singing "Maybe its because I'm a Londoner" go ahead, but beware of the bulls in the neighbouring fields.