I'm recording in London next week. All my wireless systems run from 500.00-560.000. Will I have any problems in that area of the UK with these frequencies?
Channel 38 and 70 are the only legal channels in the UK. Additional frequencies, like the ones you mention can be purchased as a special short licence. Check out the licensing authority website http://www.jfmg.co.uk/ to get your licence and more info.