The A&E department is the heart of any hospital, and directly impacts several other departments. The waiting times will therefore largely impact the business of other departments in the Hospital, such as AMU. You can see below an update from NHS England regarding the current waiting times in several hospitals. This will give you a good indication of which Hospitals are currently under pressure:

https://www.england.nhs.uk/statistics/statistical-work-areas/ae-waiting-times-and-activity/