Chief rabbi says "fact that today every public Jewish gathering must be weighed for risk is a sign of something deeply wrong".
BBC Panorama investigates the delivery firm - a market leader with the worst reputation for non-deliveries.
The 85-year-old singer says his cancer has "gone at the moment", but calls for better screenings.
Blaise Metreweli will say the threat is posed by "an aggressive, expansionist and revisionist Russia".
Former staff at the Grand Theft Auto creator are seeking an employment tribunal over alleged "union-busting".