I think they are telling the truth. But (at present) I think it has little to do with ‘a bank-run style event by British savers from their pension funds’.
Since we Brits are notoriously slothful in that regard. A bank run? Nah. Even a bank jog is pushing it. I suppose we’d maybe go for a bank walk, after coming back from the pub, but that’s the limit.
See: Time to think quickly? (UK, MBS, junk bonds, gilts, panic selling, credit freeze, banks...)