Maybe it is hard for Brexiters to think logically and consider the data?
As Eadwig points out below, there has never been parity between 1 euro, 1 pound and 1 dollar. These currencies have floating exchange rates which will be modified by political and economic events.
As I said, at the time of the referendum the £/euro exchange rate was a lot higher. Your pound would have bought around 22% more euros then than now. That’s nearly a quarter of your Spanish Big Mac.
Pricing comparisons are further complicated by local tax rates, wages and other incidentals but also by pricing power, i.e. What the producer think the market will stand in terms of price.
Disregarding Big Macs for a moment, I too can draw equally spurious comparisons in terms of supermarket wine. In France I can buy a perfectly decent French appellation controllée red wine for 2.19 euros a bottle. At the current exchange rate that is £2/bottle. So what does that prove? What I can also say is that before the Brexit sterling devaluation that bottle would have cost £1.56/bottle. Ouch!
The truth is in the tape as some of our friends say. On exchange rates, following the referendum vote the value of sterling has fallen dramatically against both the euro and the dollar and so it is the case that steling is certainly the weaker of these currencies.
You said “I am not comparing past with present like yourself I am just showing you present”.
That is bonkers! To understand the relative appreciation or decline in value of a currency you have to do so over a specific timeframe. I hope my illustrations above have helped you to understand this.
A final point, have you noticed that when the chances of a “no deal” Brexit rise, that the pound sterling falls in value against the dollar and the euro. That tells you all you need to know about what the markets think a hard Brexit will do to our economy.
Continue to bury your head in the sands of Brexit if it makes you happier in your delusions.
All the best,
Frog in a tree