Joining the not annoying voice bandwagon.
Nothing wrong with it. Peeeeerhaps people think that your accent is pretentious, but then again, that is a common stereotype with the British accent - I'm just grasping at straws here, I think it really adds to make the channel sound like 'you.'
I thought I have an annoying voice - I still sorta do, but it is amazing how YouTubing improved my self esteem regarding my voice. So keep at it and, over time, you'll learn that you don't have an annoying voice. You just need to get used to it (I really mean just you - no one likes their voice in the beginning, and us, who are not you, saw no issue with it).