Who was blaming Labour for the global recession of 2008/09?
The comparative high point of 9 years ago (although GDP growth has been higher in between) was soon after that recession. The global recession (of 2008/09) cannot take all the blame in the fall of GDP growth.
In the link you gave for GDP figures from 2000 to 2017 there was a downward trend from a peak in 2000 before that recession hit.