You're seeing it right now, if you actually look.
"UK economy could be comparable to “Slovakia” in 10 years - says economist Duncan Weldon"
https://www.youtube.com/watch?v=R5g_S9BBtqw
> The UK, Germany and France are declining in lockstep,
Nope.
https://youtu.be/R5g_S9BBtqw?t=155
"Britain is unique among the G7 countries in that GDP per head is still below that when the pandemic hit."
Notice the "unique" bit.
Forgive me but I disregard the predictions made by economists, a class of people who bear no consequences for their predictions.
You may be correct but this proves nothing.
You're seeing it right now, if you actually look.
"UK economy could be comparable to “Slovakia” in 10 years - says economist Duncan Weldon"
https://www.youtube.com/watch?v=R5g_S9BBtqw
> The UK, Germany and France are declining in lockstep,
Nope.
https://youtu.be/R5g_S9BBtqw?t=155
"Britain is unique among the G7 countries in that GDP per head is still below that when the pandemic hit."
Notice the "unique" bit.