-
That bottom piece is really a joining piece. You should either get another of those pieces so you can direct the flow straight down, or your could replace it with a downpipe shoe: https://www.screwfix.com/p/floplast-round-downpipe-shoe-black-68mm/11456
I'd go with the first option and use a hole saw to cut a circle in the drain cover for the pipe (you want it fairly closely cut so that you don't get leaves finding their way in). You could replace it with one that's got a reinforced circular section ready for a cutout: https://www.toolstation.com/round-gully-grid/p71323
the downpipe at the back of the house splashes everywhere when it rains, and we’ve run out of money to re-do the backyard properly at this point.
how’s best to fill in the whole around the drain (circled) and maybe have a splashback of sorts?
the first 50cm from the wall along the back of the house is just earth at the mo (after digging it up to put new pipes in) so there’s more water than i’d like soaking in up against the house here in general. the yard does slope down on to brick/quarry tiles with a rainwater drain at the bottom of the yard (arrow) - so it only need be a fairly local solution until we can save up to take everything up, level, and re-tile/landscape.
also very aware the render needs sorting/removing/replaced with something..!