Ask HN: Any good Swift training courses in London?

Hi UK people,

Work give us a training budget of around £500, it's a use it or lose it situation.

As an iOS developer I thought an advanced Swift course might get me out the office for a few days ;)

Does anyone know of any decent courses like that in London? Preferably in person, during weekdays and not too far in the future.

- I'm open to other suggestions on how to spend the training money (no conferences though), user interface stuff could be quite interesting too.

Thanks!