The carpark on the riverfront at King George dock has recently been closed off - at first it was suspected to be related to the lockdown but it would now appear that it is due to work commencing on the Holderness drain to build a new pumping station. This will probably mean the carpark will be closed for some time. The footpath is still open but there is nowhere close by that I would recommend for parking.
There are also riverfront works from Victoria dock to the marina which means a lot of potential viewing areas are now unavailable.
The good news is that currently the carpark at Paull has now re-opened.