Safe Area Keep Clear 4313
The Safe Area Keep Clear 4313 Sign will advertise the fact that an area has been specifically designated as a safe haven for anyone that may be wheelchair bound and that as such, the area should be kept clear at all times.
The sign would also be...

(orders over £25 + vat)
Delivered the next working day if ordered before 2pm

(continued)... useful in informing people with disabilities that the particular spot is considered to be a safe area for them, if there were ever a drill or actual fire emergency. They would proceed to this area and await further assistance. Fixing requires anything as simple as sticky pads, 'No-nails' type adhesive or double-sided tape.