Question.
TL;DR: Best C# and .NET accreditation courses (UK)?

I've started a new job as a .NET Software Developer. Now I have never done C# before but they want to send me on some courses to learn.

First I have to recommend what courses though. Price isn't an issue but they want me to give them a variety of courses available. Ones that are crash courses and online learning courses. I want it to be accredited so I can come away with something to show on my CV/LinkedIn.

What C# and .NET courses would you guys recommend or what course providers would you recommend (in the UK).

Thank you in advance!