Van parked outside of loading hours

S & Q Fresh Fish & Seafood. 638 Hertford Rd, London, Enfield EN3 5TD. This van near enough loads and unloads at 6:50pm, weekdays. Shop staff were agressive and rude, shouting at me when I questioned why they do not follow the road sign (the on in which they instructed me to read, which finished at 6:30pm daily!). Cyclists are always at danger of either going onto the pavement (which is not permitted and can cause accidents with pedestrians) or putting our lives at risk, veering onto the road joining or crashing on coming traffic. Very rude and aggressive shop staff, particularly the person wearing the blue apron. Please help us all!