There is no specific legislation that prevents you from running a cable across a footpath to your house, but under the Highways Act it could be considered an obstruction by your local council and removed. Some councils have also given specific guidance to not do so, so we would suggest contacting your council or checking their website for guidance. You could be subject to a personal injury claim if someone trips on your cable and is hurt. Some wallbox providers will not provide an installation if you do not have off-street parking, so we would suggest contacting your preferred suppliers to see if they are happy to do so.