If you goto https://labs.thinkbroadband.com/local/index.php?area... you will see our stats for Glasgow City and you fall into the gap between the two lines you can see when you click the history button i.e. 0.9% of Glasgow passed by a VDSL2 or cable service but not able to get superfast speeds.
The broadband provider should have given you a speed estimate at the time of signing up and before you committed to upgrading.
The UK as a whole has 92.8% able to get something like VDSL2/cable/FTTH but the figure for those superfast is lower at 88.6% to 89.3% depending on whether you call superfast something over 24 Mbps or over 30 Mbps
The figures you have for Exeter are miles off reality.
97.4% can get superfast. Sure... pull the other one.
There are whole areas with no fibre serving thousands and thousands of homes. Areas where FTTP was part installed and abandoned with no FTTC alternative, areas like my office which are between 2 enabled cabs, where the fibre goes PAST ours, and was blatantly left out intentionally, and not because it wouldn't be feasible).
On one large trading estate, you're lucky to get 1.5 meg in many parts of it that I encounter regularly. We have quite a large number of lines in the Exeter area (not sure how you're definiing Exeter) where this sort of speed is still normal.
Below 2 meg USC ... absolutely, plenty of areas.
Below 15 meg... wayyyyy more than 1.5%
92% of Exeter can get Virgin... haha.
In fact, I'd find it unlikely we have 9.72% FTTP - there are a few chunks, but there are far more that are completely abandoned, unfinished and are no longer being done (were dumped years ago now).
The Devon figure is also laughable.
Hell, I've got customers in the EXETER area with FTTC who get 6 meg.