Traditional Martial Arts >> Best TMA school in London, UK

I am 32 years old so a bit late to the game, but I'm interested in starting to train a martial art in London. My criteria for choosing a school are:

1. It has to be applicable to real life self-defense.

2. It should use live or close-to-live sparring. It seems to me it would be hard to learn to defend yourself without practicing defending yourself in training.

3. I'm interested primarily in learning a striking art.

4. I'm more interested in learning a traditional martial art than one of the newer MMA styles.

While I'm old to be starting out, I'm strong, fit and athletic. I've done a bit of wrestling and BJJ in the past but never really a striking art. I've thought about Kyokushin, Wing Chun, etc but would really appreciate any specific info you have on training in these styles or others in London. Thanks.