Downpipe discharges onto the pavement - damp

I have a Victorian terrace house and the downpipe on the front of the house discharges directly into the pavement. It is also recessed partial (up to first floor level). Not internal but the brickworks recesses in this area. All/most of the houses on the have the same ‘design’. There are no front gardens.

I have a damp patch where the Downpipe is internally. I am going to clear the guttering/downpipe and replace joints etc (as required).

But is there anything further I can do? I was thinking along the lines of paint / sealers? E.g Something to stop the wall getting damp if the water still splashes the area. The house has pebble dash which we are plannnig to paint at some point.

Thanks