A340Jock, It's a money purchase scheme so they pay money into your personal pot. You decide what level of risk you want to take with your money and the pension provider invests it along those lines.
I'm investing with higher risk to try and achieve max growth. Reckon I and the company contributed about £6k over the last 12 months but that £6k is only worth about £5k now judging by the pension statement.
However I live in hope