If I understand a VI lady who lives nearby, she has given up her disability bus pass in favour of an annual allowance for use with taxis and the local dial-a-bus. The latter is limited to town centre trips at particular times days but she does use it. She also uses a volunteer-driver service, I am not sure if the allowance covers that too.
As she has difficulty using the buses she finds this alternative suits her better, and she uses it to get to various the social and educational activities she does.
I was not sure, but it seems from what Sofie says these services depends on your local council and may not be available nationally. No doubt its not perfect but opinion seems to be the Poole council is better than others in our locality for disability assistance. Mind you like others it has cut back on services recently..