The earliest most people can take their pension is currently age 55. From April 2028 this will increase to age 57, with the exception of retiring early on the grounds of ill health. If you’re under age 55 and planning to take your pension early, you might need to factor this change into your plans.
Other schemes that offer you access to your pension below this minimum age are almost certainly a scam – make sure you know the rules about when you can take your pension so you don’t get caught out.