No Steve, it doesn’t stop your ability to catch it or spread it. Lessen it yes, stop it, no.
Taken from the NHS web site..
How effective is the COVID-19 vaccine?
The 1st dose of the COVID-19 vaccine should give you good protection from coronavirus. But you need to have the 2 doses of the vaccine to give you longer lasting protection.
There is a chance you might still get or spread coronavirus even if you have the vaccine.
This means it is important to:
continue to follow social distancing guidance
if you can, wear something that covers your nose and mouth in places where it's hard to stay away from other people
so whether you’ve had a vaccine or not, you can still catch and spread.