I think you might mean the current Sony VAT back scheme. I think most places are doing it. I know that warehouse express are doing it. It brings the A55 from like £687 to £585 I think.
I think the Sony centers are doing the promotion as well. I always found them expensive anyway, so maybe now its the right price.
Try searching through the retailers on the camera labs support us page. One of them might be doing the VAT back scheme. I think that's the best way. They are all website you can trust.
Hope I helped and didn't ramble on to long.