Seeing as a lot of hospital services are closed or run on skeleton crew during the weekend, this isn't in the least bit surprising. Calling in someone from home in an emergency always takes time, and time is crucial with medical care. The more prompt a service can be called upon the better.
Also, the whole "wait & see how it is on Monday" attitude is rife through the NHS. Investigation that would be undertaken immediately in the week are sat on at the weekend. It's time this ended & services are made 24/7.