I really can't imagine it is wheelchair accident, but I have never heard of a Wiltshire accent. But then the English have a ton of regional accents.
We need some Brits to weigh in on this
The OP wrote that "Thinking of a wheelchair accident" is "singing in a Wiltshire accent".
Listening to it I think the op is right, but Damn it is hard to tell. Do these kids all have marbles in their mouth?
Who thinks of a wheelchair accident? For that matter who sings in a Wiltshire accent?