The first thing is to find out if your new employer offers a company pension, and whether they contribute to it. If so, you should join, so you don't miss out on any payments they're offering. You can also keep your personal pension, and keep paying into it if you wish.
If you become self-employed or your new employer doesn't offer a pension scheme, it's a good idea to keep paying into your personal pension so your retirement savings stay on track.
Whatever you choose to do, please let us know if you've changed jobs.