Tesco apparently did a risk assessment on the ramp (which is also there to get the less able from the car park to the store) and apparently it's too steep to push delivery cages up and down, despite being used by people in wheelchairs and with prams regularly.
So Tesco took to rocking up and blocking one lane of a single carriageway A road within yards of a notoriously busy crossroads whenever it suited them to deliver, and because there was some debate about the wording on the signs that accompany the yellow lines, they seemed to get away with it - well, the council weren't very interested in any enforcement anyway.
After a lot of traffic chaos and a lot of protests Tesco apparently entered into an agreement that all deliveries to the store had to be before 7am or after 6pm but this appears to be routinely ignored - certainly I've queued to squeeze past their trucks well after 7am, but again the council seem reluctant to carry out any enforcement.
Complaints to Tesco get fobbed off and on one occasion they stopped just short of calling me a liar ('our store managers assures us that all delivery vehicles were well away by 7am this morning'), until I sent them time / date stamped dashcam footage...