Due to the UK being shut off from the European mainland because of the new Covid-19 mutation it is very likely your order will be delayed until further notice. There is nothing we can do about this at this point in time
Are there any weeds between your plants or are you dealing with persistent weed growth between your tiles? Then you can use a weed burner or electric weed brush to easily remove the weeds. The advantage of these gardening tools is that from now on you no longer have to bend down to pick up the weeds, but can simply stand still.