The Seven Dials is basically a central pivot of the seven roads and streets which lead into this junction. The road layout has altered massivley over the last 200 years, with street names changing, sometimes swapping with each other, but this is an entirely different project.
In Earlham street is the popular Cambridge Theatre, which is currently showing Matilda, the musical. Their website suggests they are fully accessible, via a side entrance.
All local undergrond stations are entirely inaccessible, with up to 50 steps as the norm. Access via local transport needs to be a nearby overground station, or by bus – or taxi.
My preference is the bus, but we all differ. Buses are accessiblle for a limited number of wheelchairs, and also there are a considerable number of bus stops which are closed due to building work in the city. Most bus stops in this area appear to be in operation.
Obviously, you can also drive into London. There are a limited number of disabled parking spaces, along with private operators parking. If you have a blue badge, there is also a scheme which for a small cost avoids the London congestion charge for a number of years. This only works for a specific named vehicle.
Cambridge Theatre – Matilda
32-34 Earlham Street, London, WC2H 9HU (1283)
Facilities: Disabled toilets, Infrared hearing loop, Wheelchair accessible
The theatre does not look particular;ly accessible, but from reading the fine detail about the Cambridge theatre, there are alternative accessible routes into the theatre. I would recommend contacting the theatre directly to clarify this.
They clearly mention an accessible toilet facility.