If I put my number plate on retention do I have to remove it from my car immediately?

I am in the process of buying a car and want to put my private number plate on retention prior to part exchanging my current car. The dealership has advised that, after using the DVLA online retention...

Where can I get a cheap private plate?

How can I get a private number plate without breaking the bank?

How much does it cost to keep a number plate on retention?

I have owned a personal number plate for forty plus years, I have had an offer to buy the car but want to keep plate on retention. I believe this will cost £80 and then £20 a year to keep it on retention....

I bought a car with a private plate and the previous owner gave me the retention certificate. Do I need to apply for one in my name?

Three years ago I bought a car with a private plate after the previous owner died. Her husband gave me the retention certificate in his late wife's name, and I am registered as the current keeper of the...