No. Motorways have M numbers, not A numbers.
The M23, part of Britain's motorway system, was constructed between 1972 and 1975. It is most known for it's accessibility to the M25 - the circular motorway that encircles London and nearby communities. The M23 runs north/south and connects to the A23 continuing on to Brighton. The M23 is a primary access road for Gatwick Airport, Crawley and other communities in West Sussex.
The first Motorway in UK (M6) was opened in 1958.
A motorway in the UK is a major 'divided highway' type of road, serving major towns and cities. A motorway 'marker' could be the small signs seen along a motorway that identify the exact location and distance to the end of the motorway (useful for reporting position if your car breaks down). These are every 500 metres. If the question is about how motorways are marked in the UK, then all motorway signs are white text on a blue background. Exits (off-ramps) are signposted well in advance while driving on the motorway.
I believe that the highest numbered motorway in the UK is the M898 a short 1/2 mile spur off the M8 in the Glasgow area.
The highest motorway in the UK is the M62 near the boundry between Yorkshire and Lancashire which reaches 372 metres (above ordnance datum)at it's peak. == ==
There is no band under the name A23. There is however a battery known as an A23. The A23 battery is small, eight-celled, and provides 12 V in voltage.
Yes, a Robin Reliant is not classed as a 'slow vehicle' for the purposes of exeptions to the motorway.
"Seventy: Speed Limit on a Motorway" (in the UK).
just over 2,200 miles
Yes you can
about 2hours if there are no hold ups on the motorway
The first motorway opened in Britain was the M6 (M=Motorway). It was known as the Preston Bypass. It was opened in 1958. When it was planned, the Preston Bypass was seen as the first piece of a large network. It was deemed a success and led to the construction of a second motorway, the M1, opened in 1959. There was no speed limit and no crash barriers and hardly any traffic -- now that's what I call motoring! The M6 is also Britain's longest motorway and Britain's busiest.