I was reading that from 1st August, revenue sharing on 0870 numbers was to cease. Some have already migrated to 0871 whilst others have gone to 0844 (which has a myriad of subsections).

OFCOM "encourages" providers to stop charging more than geographic numbers such as 02/03 etc. but it is not law.

If I've missed something and this has been covered then sorry and please redirect me.