Hiya
You might want to give these guys a go (Wandsworth):
http://www.childrenstherapies.co.uk/
A qualified Pychotherapist or children's Counsellor should be fine for those issues (you don't necessarily need a Psychiatrist). There are a number of directories you can try but
www.itsgoodtotalk.org.uk is quite good (just check they work with kids).
Talk to your GP as they may be able to make referrals/recommendations too.
Finally, this is a really nice article on how to support an anxious child:
http://blogs.psychcentral.com/stress-be ... hould-try/
Definitely worth a read if you are struggling with how to deal with this.
Best of luck!