As a Minister (Under Secretary of State for Northern Ireland) Ben often speaks in the house with regard to his ministerial position. This in no way impacts on his ability to represent his constituency, in fact being a Minister means he does not bring constituency matters up in the house but instead has direct access to his ministerial colleagues concerned, which means he can highlight constituents issues at the highest level.
Here you can find Ben's latest speeches and appearances in Parliament (feed provided by theyworkforyou):