I am aware of the difficulties referred to in the question.
I have indicated that it is intended to consult extensively with representatives of consumer groups, of disabled persons, of taxi service providers and others, to develop further quality improvements for taxi services for the benefit of both the service providers and the general public alike, in the medium term. The quality improvements referred to may include, if appropriate, further improvements of the existing specification for wheelchair accessible taxis. A definitive timescale for this consultation process has not been fixed but my Department will finalise a consultation document in the near future.