I answered a similar question last year, asking about Great Britain considering it during the American Revolution. Simply, formal requests for representation in Parliament were not granted for a few reason in the prelude to the American Revolution. The anti-taxation protests of the mid and late 1760s made British feel like they were dealing with rebellious children, rather than responsible colonists. They did start to reconsider during the Revolution (see the link above) but by then it was too late.

As a follow up, did any British colonies or territories gain representation in Parliament?

Another follow up: Was it ever considered?