Just had a call. Guy identified himself as being from 'Pension Aid' and said it wasn't a sales call, he then asked me if I was aware of the 'pension crisis'. I explained that I was but as I was in a final salary scheme to which I was making 18% of gross salary contributions I should be OK. He agreed I should be OK and said he'd update my records. I asked for a 'Do Not Call' note to be put on my records.
Number has been on TPS for over 10 years. Submitted complaint to TPS. Suggest others do the same if they have calls from this number or similar: https://complaints.tpsonline.org.uk/Consumer/