What can be done about this?

[Scott_D]

Remove the remains of the coving
You might be able to fill and paint to blend it in.

Or cut a few strips of plasterboard to follow the line of the coving and butt up to the shower panels

 

[armyash]

I know it doesn’t help now, but for next time. Fit up to the bottom square edge of the coving - sometimes that will be just fine as is. In a case like yours where the board sticks out proud- put another piece of edging trim along the top and mitre the corner of the trim. It looks really tidy this way.
That is a big ugly trim too, get the small square edge trim that just laps around 4/5 mil.

That is the small trim but we have had to flip it over and have the bigger face on show. Not clear from the photos but the other board meets the door frame and if we used it the way it's supposed to go won't get enough movement on it to hide any gaps where the door frame is a bit skew-iff. But yes looks a bit ugly.

Thanks for the advice on making good.

 

[armyash]

To get over that abortion I think I would remove the remains of the coving in that corner and attach some flat board / soffit on the appropriate width, attach it to the ceiling and butt it up to your boards.

The remainder of the coving in the corner is coming out first thing.

 

[Ben-gee]

Ok.
Again for next time, you’re better off scribing the board to the architrave and then run a small bead of silicone. Where the board goes higher than the frame, usually 300 or so, just trim thus small section of edge - trust it looks neater.

 

[Scott_D]

The remainder of the coving in the corner is coming out first thing.

If it’s 12mm or 9mm off the ceiling you could try a handy board and add strips to blend it all in. Would need some white paint though to look acceptable

 

[Jim Goodenough]

Evening Armyash, I do loads of wall panelling and normally finish on underside of coving and fit 'J' trim and caulk if necessary (see below not best pic). However in your situation I'd carefully remove rest of coving and stick a 25-30mm white PVC cloaking piece around (can buy 5m length from Eurocell or similar for £5).
ATB Jim

 

[ShaunCorbs]

tbh it looks worse than it is

 

[armyash]

Thanks for all the replies. Looks like I should get over it now.

 

[armyash]

Evening Armyash, I do loads of wall panelling and normally finish on underside of coving and fit 'J' trim and caulk if necessary (see below not best pic). However in your situation I'd carefully remove rest of coving and stick a 25-30mm white PVC cloaking piece around (can buy 5m length from Eurocell or similar for £5).
ATB Jim
View attachment 39155

Thanks.

 

[Scott_D]

What’s the best way to sit the panels onto a tray or bath?
The trim some company’s sell looks a bit naff