Hmm. There's the UK small business exemption (due for repeal), there's
exemptions for armed forces, various things. But not much.
There are quite a few exemptions out there. The biggest being "undo
burden" that one is pretty much a catch all for any excuse not to be
accessible to the handicapped.
§ by treating him or her less favourably (without justification) than
other employees or job applicants because of his or her disability, or
§ by not making reasonable adjustments (without justification).
Key words here are "without Justification" (Called undo burden in 508)
My company bought this software, then we hired Sue, the lady with the
vision problem. We can not afford a new version or a wide screen
monitor. Poof, Justified. Also with 508 (I can not speak for the UK
here) but a site can be completely in accessible to all the handicapped
people in the world, except for one single page that some government
agency needs to use. That is considered an accessible site based on the
508 rules.
Please note, I am a proponent for accessibility, (I am frequently
contracted to deal with Flash accessibility issues). I am just pointing
out the laws are bogus, full of exemptions, and for the most part do not
apply to non government agency.
For the OP, the bottom line is, if the Company signed off on the design
of the Web application, then you are in the clear. If the company has
issues, then they have to pay for them.