On the contrary - please stop remoaning - the UK has now left Europe as of 2021, and there is nothing that can be done to reverse that. Continuing on its current path it will depart the solar system by 2022.
A pity we cannot geographically move it off as well as politically , well it is not continental Europe with that horrible continental breakfast. A tea spoon of orange juice a grape and a.piece of circular bread.
Almost all the financial firms in the UK have opened EU trading offices in Ireland or the Netherlands or Frankfurt. They’ll still keep their global trading offices in the UK but the EU is a big wedge to miss out on. No way the EU will make it easy for the UK to hoover up the cash from the EU. It’s all very well having Fintech from the UK but it’s they can’t access the EU market from the UK they will have to do it from their registered offices in the EU now.
The bigger issue are IT services overall. That’s surely where the fastest and most lucrative growth is coming from compared to financial services and goods trading.