Interesting...
Plotting the route on 2010 charts (the only ones I have in electronic version, as a one piece UK map) there is no bust at 5000ft. I don't have the 2011 printed one to hand, and I don't have the northern part as a printed map anyway.
Plotting the route in Flitestar, using current navdata, there is also no bust at 5000ft.
The CAA map should be totally correct below FL195, regardless of any desire to de-confuse.