Someone posted pics of this car on here last month! It's a XK150 and a Morris Minor woody combo meal Sold for £24k and it was a running joke with people passing by the auction tent
If the handbrake is not defective then you have no comebacks. If you were to go against Nissan on this you would require an Expert Witness report doing showing that their work or parts were substandard or defective.
It's a very long shot