Probably easier to use their CSV feed https://static.dwcdn.net/data/oDTQ2.csv
Unleaded,Super unleaded,Diesel,LPG
155.82,171.40,179.18,86.38
pence per litre,pence per litre,pence per litre,pence per litre
↘↘ Should fall sharply,↘↘ Should fall sharply,↘↘ Should fall sharply,
11/12/2022,,,
That table is dynamically-generated by your browser from a bunch of Javascript. You can see that by doing View Source (Ctrl-U in Chrome/Windows). The scrape sensor cannot deal with that. Definitely go with the CSV option.