It’s still yours.
It will remain in your pot, even if you stop paying into it. You’ll get your pension when you reach the scheme’s pension age, in this instance.
Depending on the pension scheme for your new job, you may be able to continue contributing to that particular pension pot, or if you need to start a new one you may be able to combine them both, or else your old pot will wait for you to retire.
You won’t loose the money when you move jobs.
Always ask your pension provider.
If you’re self-employed, you can use the National Employment Saving Trust (NEST).