Mono-Monday: (Registration) Numbers

This week's Mono-Monday challenge, kindly and expertly hosted by nickimags888, is "Numbers". We were pondering (during a coffee stop on our car journey today) what to blip for this, when a lovely old car pulled into the adjacent filling station. Besides being so beautiful, I noticed that it had the old-style type of UK registration number, on an equally old-style silver-on-black plate - these being legal on cars registered more than 40 years ago, on a rolling basis, as long as they are registered with the DVLA (Driver and Vehicle Licensing Authority) as "historic vehicles".
 
(The history of the format of UK number plates is complex and interesting, and can be found on Wikipedia at this link. At the time this car was registered the "JL" as second and third letters in the registration indicate that it was registered in Boston, Lincolnshire. We were quite near Boston at the time.)
 
I have to confess that I could not immediately identify this old car. Closer inspection revealed it to be an Armstrong Siddeley, and following on-line research I'm pretty sure it's a Whitley Four-Light Saloon, of which 2,624 were manufactured between 1949 and 1953. Armstrong Siddeley cars were produced between 1919 and 1960. The company also made aero engines.
 
Our journey was, of course, from the Norfolk Broads where we handed back our boat at the boatyard this morning. However, rather than going straight home we decided to travel to Cheshire to visit my Mum-in-Law for a few days. This allows us to check up on her(!), and also saves me from a longish train journey to Manchester on Wednesday, as I'm fortunate enough to have a ticket for Bruce Springsteen's concert there that evening!
 
I'd like to thank all those blippers who've followed my holiday journal for the last several days, especially for your lovely comments, stars and hearts. Owing to shortage of time and very variable internet quality I've not been able to comment much myself - sorry! I have however enjoyed dipping into your blips now & then.