I think the last few years it has become more percussive rhymic techno rather than 303's all the way. DAVE Drummer, Guy Mcaffer, pounding grooves have produced some excellent stuff imo, and i think in some sets a bit of london techno can work alongside other forms of techno. I think it depends where a dj takes their set as to whether it fits in ok with other styles. I tend not to be really into the suf acid stuff but I have some Dave drummer, cluster, raw, maximum minimum recirds that are excellent and do not to me seem out of place alongside other forms of techno, from more detroit influenced stuff to the swedish sounds.
I've heard Chris liberator playing Beyer, Henrik b, speedy J and other non london techno and I've heard people like mark eg play stuff from skoog, beyer, primate, to london stuff, and myslef have mixed sets with a range of styles of techno on them, including the occasional bit of London stuff.
I think its all just different takes on techno at the end of the day, and somewhere london/other stuff crosses over and bears some relation to each other, though of course different producers produce different styles.
I think the free party scene very much defines a lot of what the liberators etc do and there seems to be a bit of politics between ''free party'' folk and ''purists'' which sometimes segaragtes the music in people's minds. Personally i just love techno music and will listen to various forms of it and play it if i think it is good and fits in with a set.