If they are conducting Government business on WhatsApp they should have to back up all messages to a secure server. If not, then they can claim they didnt get any message. It will be down to the individual then if they can pull up a message that proves someone is lying.
This whole thing is marginally more believable than Rebekah Vardy's agent losing her phone at sea. Marginally.
This whole thing is marginally more believable than Rebekah Vardy's agent losing her phone at sea. Marginally.