The Pensions Regulator has circulated the following document to advise people on pension scams. The main tactics scammers use are:
1. Making contact out of the blue
2. Making promises of high /guaranteed returns
3. Offering free pension reviews
4. Allowing access to your pension before age 55
5. Pressurising you to act quickly
The document can be accessed at
https://www.thepensionsregulator.gov.uk/document-library?res=/-/media/thepensionsregulator/files/import/pdf/pension-scams-booklet-members.ashx

It is well worth a read    (Courtesy of NY Police)