Sorry Guys, I see that this is a recurring topic!
First of all, the Templot track-plan without catch trap points, 1960, BR (W), along a sunny branch-line to somewhere...
And a corresponding schematic for illustration, with my guess at where catch trap points should be. I've identified the only through traffic route in green, so I've considered this to be the primary route, protected from all other exits.
You'll note on the Templot that there's a small (off-scene) sector plate, but on the schematic there's a single slip shown, with a stub siding (g). That is only to illustrate what the sector plate reproduces off-scene, in my head, in the world beyond....
The platform end shown I've assumed to be a #3, where branchline mixed train services terminate. A platform 1 & 2 somewhere else further off-scene would serve the through branch traffic.
Beyond scenic exit (d) there's a line out to a quarry past a level crossing. The only through traffic (green route) would be mineral wagons. There's none running today because the level crossing is closed due to an accident...
(a) & (b) are local goods sidings, with buffer stops.
© is a headshunt serving exit (e), with a buffer stop.
(d) is a stage exit - a mineral line leading to a level crossing and a quarry
(e) is a stage exit - leading to a small coaling stage and a creamery, both off-stage
(f) is a stage exit, it represents the first sector plate position and leads to the middle line / platform loop off-stage
(g) is off-stage, a theoretical bay siding and the lower second sector plate position
(h) is Platform #3 receiving mixed train formations
So, if you'd all be kind enough to hold my hand through this....
Question (1) Catch Trap points - please, where should they really be located?