Norfolk Suffolk area, I would say Suffolk Water Park, but getting onto fish can be very frustrating, as people move very quickly onto them, or be lodged in the swim you want for days. Also, I believe the shower at the cafe is currently unavailable as it is being refurbished. However, if you get it right, and get lucky then you could have a few fish, they go high 30's, or 40 if you have JS scales...
Other waters, Waveney Valley, Heartsmere, Yew Tree, Marsh, on the Two counties border. Just Google Waveney Valley and you will get the details and web page appear. Some nice fish, some good facilities etc.
Taverham Mills up near Norwich, again has a website, but I know the phone number is 01603 861014. Fish do go to 30+. If you have a look through Norfolk waters I know there is a very very detailed breakdown of the lake, complete with some of the features to aim for! I wrote it after fishing there from 1992 until 2002
Camelot, another water in the same area as Waveney Valley, or Burgh Castle near Great Yarmouth. These last two I haven't fished however so can't give any more on them.
An alternative is Lee Valley Fisheries, look at either Banjo Lake, or Stock pit
https://www.visitleevalley.org.uk/go/fisheries/
Not too far to go, and you may find these peepul can un'stand wot you talkin'bout.