Originally Posted by
Britsinvade
These apps are not fraudulent. They simply take the 0800 number and look up for an alternative location based number. The app owners collect this data from a number of sources. It is neither fraudulent or illegal.
If it is just looking up and calling another number, then thats different to spoof as sugggested by "and it masks this with a UK domestic number"
Looking up another number, no different than sites like saynoto0870.com but what was suggested which was to mask the call to appear to be to an 020 number seems quite likely to be illegal