The wikipedia page you mention says that "The common use of the term pension is to describe the payments a person receives upon retirement, usually under predetermined legal or contractual terms."
I'm familiar with retirement accounts and pension plans in a number of countries but not in the UK. I see that in the UK "pension" is often used a short-hand for "pension scheme" (it seems a relatively new development which I've not seen reflected in dictionaries).
For what it's worth, the wikipedia page for Personal_pension is redirected to Personal_pension_scheme: "A personal pension scheme (PPS), sometimes called a personal pension plan (PPP), is ..."
I'm familiar with retirement accounts and pension plans in a number of countries but not in the UK. I see that in the UK "pension" is often used a short-hand for "pension scheme" (it seems a relatively new development which I've not seen reflected in dictionaries).
For what it's worth, the wikipedia page for Personal_pension is redirected to Personal_pension_scheme: "A personal pension scheme (PPS), sometimes called a personal pension plan (PPP), is ..."