It didn't need to have all the Uk's goods, the fact it blocked the canal for a week, preventing hundreds of other freighters from getting through was the bigger effect. Some of course were tankers, and the companies bosses redirected them to other places, which left us short, and with increased lead times to be resupplied.
I have heard one estimate from a leading freight company that reckons the blockage has delayed or otherwise affected either directly or indirectly well over 25% of the worlds marine freight .