Potentially every MP has investments managed offshore through the parliamentary pension scheme. The latest annual accounts of the Parliamentary Contributory Pension Fund disclose that one of the fund’s managers is BlackRock UK Property Fund. A quick look at said fund’s prospectus shows it is domiciled offshore in Jersey:

When Labour MPs condemn Cameron’s father as “absolutely disgusting” for incorporating trusts offshore, remember their own pension scheme is run by fund managers domiciled in Jersey…