Righty. All UHF systems will be made obsolete in a short time. Ofcom are moving the part of the spectrum allocated to wireless systems from CH67/68/69 to CH38. All kit on CH67/68/69 will become illegal to use, full stop.
There are a few manufacturers that have started producing kit for CH38 already but it's a tad expensive. The government will be operating a compensation scheme for kit that will be becoming obsolete but there's a few problems.
1. Compensation offered will only be at the second-hand value. (And they determine that value. Something purchased for £1k will only be compensated at a negligible amount)
2. It's only being offered on kit purchased before a certain date. (I believe that date is something like Oct08. I may be wrong on that, I'll need to check)
3. And as far as I know, it's only being offered for kit on CH69
Big hire companies etc. are up in arms (with good reason) as their whole hire fleets are being made useless and it'll be costing them thousands to replace what they can't use.
However.... The VHF frequencies used for some older kit, remain unaffected.