They don't decide on a recall. They can sanction an MP, such as suspension from the House of Commons.
Instead, a recall petition - requiring 10% of an MP's constituents to sign to then recall - is automatically triggered when an MP is suspended for 10 or more days.
Instead, a recall petition - requiring 10% of an MP's constituents to sign to then recall - is automatically triggered when an MP is suspended for 10 or more days.