Recommended ASP.net intermediate training (London, UK)

Question

Does anybody have first hand experience of intermediate ASP courses in London, UK?

We're looking for a short course (c3 days) to sharpen our ASP skills (C#/DB skills etc are fine). We have constructed web pages/user controls etc. but want to ensure that we're following best practice and to ensure our sites have decent design and implementation. A focus on AJAX controls/implementation would be useful.

I know I can look on the net and I'll find 100,000 courses. I want first hand experience and recommendations!

Thanks in advance

Ryan