We really need a sticky with the main options listed to answer this quick and easy.
Personally I’d say Tomtom Pro 6250 (not the 620) with lifetime maps, decent traffic and cameras. Works well in central London. Not cheap but for multidrop you’ll find the maps don’t include many small roads.
Only problem it has is those daft 16T limits that apply during random times. It sets each as a permanent limit but thats not an issue with 7.5T.