I'm looking for a company or individual in the UK to clean the inside of a lens of mine and I'm hoping one of you can recommend  someone. 

The lens is a Tokina AT-X 100mm macro that I bought about 10 years ago, it may be old and a little slow and heavy compared to modern macros but  it has been instrumental in the production of many of the images in my gallery and I would hate to lose it.  The contamination inside the lens barrel doesn't appear to be organic but you can see its effect it has on captures when using extension tubes although there is no effect when using the lens normally.