Based on 20 years of weather recording and observing in Norwich, I doubt we will break the UK record or even the July record. We need a strong-ish SW flow to be the hottest place in the UK, regardless of upper temps (generally!). Tomorrow the winds look to have too much of an easterly component to them. I wouldn't be surprised to see 35C tomorrow (which will be the 3rd highest temp ever recorded for Norwich - 1932, 2003 being the top 2) but 36+ seems a little too far.
Hope I'm wrong, will certainly be watching the VP2 tomorrow!!
Norwich Weather : www.norwichweather.co.uk