As a customer, when I recieve an email and click on a link, I expect to be taken to the link straight away.

I've observed across a number of devices, operating systems, networks, that click links from dispatched emails is very slow.  70% of the time, it seems to take over 10 to 20 seconds, sometimes more.  I've also seen it on different instances.

Types of links

1.  View in browser

2. Subscription centre

3. external links (www.bbc.co.uk), (www.kcl.ac.uk), 

I've tested a combination at the same time, so mobile on a different internet connection and my desktop with a wired connection, and both have shown slow load times.