Like I said the fall of pound has been spectacular in last 4-5 years.
* Engineer Dublin 2015 - €100K ~£70K
* Engineer Dublin 2020 - €125K ~£112K (5K eur increases per year)
* Engineer London 2015 - £70K ~€100K
* Engineer London 2020 - £95K ~€105K (5K gbp increases per year)
Both engineers start at same pay 5 years ago, both of them think they are moving up in the world with reasonable pay increases per year. One of them is being screwed by falling value of pound against just about every major currency due to Brexit and all the uncertainty.