@JH_Brexit Yates doesn't come across v. well, but doesn't refer to the government forecast specifically.
Roughly extrapolating from your graph, Robobank's analysis might be indicating extremely low growth but perhaps not, I'll concede, negative growth overall during the coming decade. 1/? @JH_Brexit But he indicates he is ultimately using his own analysis, so strawman challenge is a fail here.
But what I now want to do is challenge an assumption, not in models but in your interpretation of it: that the success of an economy is determined by a growing GDP. 2/?