How should I know? What is this BR salsa anyway, and how does it differ from any other sort?
There are lots of styles, aren't there, and seemingly, little agreement as to the competing merits of any of them.
[Afterthought: Perhaps Classical Sequence would be a better project for the New Year. I could even learn the Gainsborough Glide - it always makes me laugh.]
Just to clarify, by "BR Salsa", Ballroom Salsa is meant - i.e. Salsa as taught by teachers with a general background in Latin Ballroom, often without much of a depth of experience in Salsa itself. (Terence here is a prominent exception to this pattern - given that he's been about long enough to have in-depth experience of all the stuff we're discussing!)
As Salsa dancers, we probably have a tendency to lump other forms of partner dancing together into a "Ballroom" heap, whereas someone like yourself with a wider perspective will distinguish between "Ballroom" and "Latin". But to us, "Latin" teachers should definitely be described as "Latin Ballroom" (because we've seen what dancing is like in Latin America, and it doesn't really look like that

)
If you're interested in learning Salsa, tell us whereabouts in the UK you live, and I'm sure someone will be able to recommend some reliable teachers local to you.
In terms of styles, the 2 main styles that will be accessible to you in the UK will be Crossbody Salsa (sometimes known as "slot style", in practice it's a mix of LA style and NY style); and Cuban Salsa. Cuban style is less common than crossbody style in the UK, but there is a growing scene. In practice, most people who learn one style will dip into other styles sooner or later.
But on the other hand, if you're just looking for something to "dip into to", you may find other forms of dance to be a "quicker win". In my opinion, Salsa is one of a number of dance forms that you have to immerse yourself in for some time before you can expect to get to a reasonable standard.