It is the customers responsibility to ensure that there is parking available outside of your premises on the day. This may mean talking to your neighbours in advance of the move and checking that they will move if necessary or putting a bin or bag in the road to save the space. If you have meters or permit parking, make sure you have plenty of change or the required permit available to hand.
Below are some links to local council pages where you can research your parking options and apply for a permit if needed.