Hi everyone, i'm new to the forum and would like some advice on the following matter.

Basically, i have just sold my car which has a private registration plate on it and I only realised today (at about 3pm) that the DVLA offices will be closing at 5pm and they are only open Mon-Fri as i need to put my current private registration plate onto 'retention' which is £105.00 for the year and transfer my previous (original) number plate back onto the vehicle.
The problem is, i couldn't reach the DVLA office in time with the relevant paperwork etc as i was at work and apparently the application takes a minimum of 5 working days to be completed (transfer old reg back on).

The purchaser is travelling down tomorrow and will be here by the afternoon to collect the vehicle, i have informed him that i didn't realise that it took a minimum of 5 working days to transfer the registration plate and that it had slipped my mind unfortunately. Although i did suggest leaving the pick up until saturday 30th to allow for time to get things sorted, he insisted on picking it up tomorrow and his solution is to travel with his friend by train who has trade plates (i am presuming he is a mechanic or something) and i will put the original number plates back onto the car and he will put the trade plates in the window screen etc on display to travel back home with.
On Monday morning i will then go to the DVLA office and fill out/give the relevant paperwork to enable my private registration plate to be put onto retention and for the previous original number plate to be transferred back onto the vehicle. The new keeper said he will not use the car and will park it on his drive until the original number plate has been transferred, at which point i will contact him and let him know it has been completed.


Does this seem okay to do?/legal?

Thanks in advance for any info/advice it is much appreciated!
Mike.