The Dispatch | Expert | Scudo Hub

Only making assumptions of course, but as it's near side and likely seen more use than the off side door.
I'd be giving the lock internal mechanism a close look at for accumulated wear/galling/backlash etc.
I'd probably also inspect and measure the O/S lock action to compare it to the N/S one to see
if my suspibions were confirmed.

It'll probably attract interest from someone who needs a cheap WAV and can live with a 1.9D.
The 1.9D is simple and reliable (if looked after) but gutless and not that economical compared to the HDI.
30-38 mpg vs 45-52 approx and definitely an issue to be considered with fuel prices being so high.

Interesting.
I got a copy of The Peugeot version a while back and tbh it's a bit if ball ache to use as it runs
on XP via VMware but eventually( did I say it's a PITA?)
I managed to extract and build a library of all the 2.0 HDI wiring diagrams which what I mainly wanted

Dispatch/Expert/Scudo vans don't use cable colour conventions, instead each cable has its own unique code printed on the sleeve.
When you have these, tracing cables for testing/repair/modding becomes so much easier.
It made bypassing the flakey factory remote central locking pretty easy when I changed it for
an aftermarket setup which was dead cheap but works surprisingly well.
Only 4-5 months in but the remote still works from about 40 meters away and well, it just works!.

The rest of it might be useful say for part numbers but I haven't had to run it for ages and would only do so reluctantly.

The Peugeot WSM is pretty chunky, around 20GB or so, probably because it covers so many models from the 90's to 2013
if the guy on Reddit can extract particular models and display info in useable non PITA format, best of luck to him.

I your 1971, I raise you The Singing Postman of 1965

https://www.youtube.com/watch?v=hn5m4m5VdP8

Its a shame to see so many vehicle specific forums decline as they've been such good resources.
There is a Facebook page for Mk1's but it's well....shite really, like a lot of FB
Possibly ok for buying and selling but still crap IMO.
Vehicles wear out of course or people move on but
I blame it, or at least link it to the decline of peoples attention span and inabilty to compose and string
sentences together.
When I were a lad..........................

Is it possible your aforementioned use of wvo is a factor?

for reference
"Using Waste Vegetable Oil (WVO) as diesel fuel requires strict management, primarily because vegetable oils are highly susceptible to "diesel bug" (microbial and fungal growth). WVO contains residual water and food sugars, providing the perfect breeding ground for these organisms which can destroy your fuel filters and injection pump"

I get the wvo thing, we'd all like cheaper fuel especially nowadays, but I wouldn't do it in my HDI
and in all my years of multiple deisel vehicles I have never encountered 'deisel bug'

My sympathies, every time I look into the engine bay the thought of servicing the head
make  me think "sod that ! I'm too old for that shit"

Dropping the turbo and pulling the head/manifold sounds like a plan, hope it works for you

Ah!
It was kind going that way I suppose
We all tend to hope it's going to be something simple and easy to fix at first
until  reality kicks us in the arse.

Not going to try and tell you how to do the job, but would suggest you consider replacing the cam belt and water pump while you've got it apart.

BTW  I fitted one of those cheap Ebay remote cental locking gizmos the other day and it's working well
I'll put a post up about it here soon.

I googled it and AI says
"Yes, many 2017 Citroën Dispatch (and Peugeot Expert) vans use a "wet belt" system, specifically within the 1.2L and 1.5L PureTech petrol engines.
However, if your 2017 Dispatch is a diesel (HDi), it generally uses a traditional dry timing belt rather than a wet belt system.

Well it did fail on the exhaust and  a CV boot too, so not that bad for an old banger eh?
It's going in to be fixed on Tuesday and I'll hopefully soon have the old  thing road legal for another year.
BTW Exhaust back box section only £57 from Ebay so not painful.

Lola Kinks eh?
Sounds like a nice young lady. Good family, well educated and all that