You mean, if England wanted to rejoin the EU.
Remember that Ireland, and Scotland if it was already a member, would have veto power, and could insist on their interests taking priority.
Rather like Spain could insist that the Gibraltar problem was resolved to their satisfaction, and fishing rights.
Being a member brings rights and privileges.
UK has decided to throw them away.
Spain should be told to. Go and do. One
And concern themselves with catalonia
They should also. Bear in mind that if all. The brits stayed at home and de cide to go to another country to get Boozed up there economy will collapse