Loosely yes. Refusing to answer can lead to you being in contempt of parliament. Once upon a time there was even a prison cell in parliament for use in such cas

Loosely yes. Refusing to answer can lead to you being in contempt of parliament. Once upon a time there was even a prison cell in parliament for use in such cases. Unfortunately our oversight committees depend on some fairly ancient ways and powers. Hence the cute story a few months ago of the parliamentary bailiff, which is normally a purely ceremonial role, arresting that Six Three guy passing through the UK. Perhaps those ancient laws need modernising, as there's certainly a few relics among them. Then again it is only fairly recently they have been started to be treated with contempt.