I love that Lansman said that it was Corbyn's 'night off' and that his office didn't know he was there.
First of all, when did 'nights off' become a thing for the Leader of the Opposition? Alongside his 'days in lieu' it suggests a profoundly unserious man.
Secondly, how mired in fringe, hard-left crankery do you have to be that your idea of fun is spending Easter Monday sharing your beetroot with a bunch of anti-zionist Jewish nutjobs?
Third, how stupid does Corbyn have to be to think this would either go down well or go unnoticed?
Fourth, the overall impression is that unless minded 24/7, Corbyn will inevitably wander off and stumble into a meeting with anti-semites and/or terrorist sympathisers, appear at the embassy of a hostile South American country or have a cup of tea with a Soviet spy.