have tried for over 3 months to book a delivery slot have a been a customer with ocado when they were with waitrose, it was a really good delivery service, since joining with M&S it has become dreadful, i have been a regluar customer with M&S for many years and would have thought M&S would have some sort of priorty booking for loyal customers this should be picked up by Sparks Card, and Ocdo for loyal customers.