Hi Guys,
I created this star chart which lists the constellations above you at a certain time and place. Its based on
Solar time.
Using this map, London at Solar Noon should have the constellation Cassiopeia above it. At 12 Midnight in London, you should see Draco above you, Bootes and Virgo to your South, and the North Star, Ursa Minor, Cassiopeia, and Andromeda to your North as the map suggests.
You can double check the Constellation accuracy by using the website Stellarium -
https://stellarium-web.org/ For example, I entered London at 12 midnight and viewed the constellations I should see (Pictured below). You might have to make slight adjustments for differences between Solar time and Standard time.