Broken clay gully/trap - What to replace it with?

[IgamOgam]

Son-In-Law is renovating the patio area at the back of his house and restoring the surface to be at the correct level (2 bricks down from DPC I believe) by removing all the additional layers that have been added over time. He may (or may not) have damaged this clay gully/trap that would have been installed when the estate was built sometime in the 1960s. The gully/trap appears to have a vertical outlet into a 90 degree bend connected into the soil/waste system.

Ignore the plastic pipe, it's a temporary bodge to take waste water from the kitchen sink and washing machine into a nearby inspection hatch/chamber.

Can anyone shed any light on the make/model of the gully/trap and how we might best replace it, and what with. The vertical outlet from the gully/trap is cemented into the collar of 90 degree bend, so is probably going to be tricky to remove without causing further damage, so and advice on how to do so would also be greatly appreciated. I've attached a sketch of the rough dimensions of the gully/trap

 

[blup]

Time for a new gully, a roddable bottle trap type seems the best option. Laying a new patio is the ideal opportunity to get the levels right. Clay to plastic connectors are available

 

[IgamOgam]

Time for a new gully, a roddable bottle trap type seems the best option. Laying a new patio is the ideal opportunity to get the levels right. Clay to plastic connectors are available

Yes. I'm also thinking a bottle gully with a square/rectangular grille and a 90 degree bend into the collar of the clay pipe. Just a question of whether I can make the dimensions work, whether I can separate the existing components without breaking anything else, and whether there is a 90 degree fitting that is suitable to fit into the collar of the clay pipe. More googling to do and a visit to some local builders merchants here in Newport tomorrow.