That is a highly distorted picture. Take a look at the graphs below. Although the £ did take a temporary dip just after the referendum, because of the prevailing uncertainties, it is now rising and the fact is that we were getting lower rates in 2011, 2012 and 2013 than we are now. Why didn't Mr Lomath complain then?
For the last ten years, the £ has been artificially low against the euro because the UK treasury has been forced by the EU to buy it and bail it out. Those who took continental holidays in the period 2005-2014 were frequently getting rates of only 1.1 euros, which after commission meant they were virtually equal.
There are good and bad things about shifts in currency value. A high level of the pound makes it harder from British business to export goods or attract trade from tourists. British farmers find it harder to sell their cheese because French, Dutch or Italian products seemed artificially cheaper by comparison on the supermarket shelf. That affects farmers for fifty-two weeks of the year, not just two weeks. Mr Lomath's grandchildren scoffing ice-cream in Lanzarotte are not the only people to be considered.
I am tempted to tell him to stop whinging. Yes, I think I will. Stop whinging, Mr Lomath!
Personally, I changed all my foreign currency last November, when the £ reached a 15-year high against the euro. I took advantage of the rate of £1.36 euros to the £ which was the best you could get after an online search. I didn't have to change money when the £ took a post-referendum dip, but now it is rising again, I am optimistic.
The signals from Europe are now that bankers are advising the leaders not to go on shoring up the debt-laden euro economies. If that happens, the euro may fall and indeed it may be phased out. But we will survive and Mr Lomath's grandchildren will have a lot to be thankful for.