Yeah had it just a couple of digs different from the doctors, you cannot return the number. Best thing is find out as much as possible about the company and then shop them to Ofcom. If they other overseas what can you do.
All this is with TPS in place I should add
Seems the latest trick both from UK and overseas.
The latest favourite is using a local STD code to make it look like its something important like a local school or doctor, makes you take the call.
Some days I hang up, others try and keep them on the line as long as possible