Dead Firethorn (curling brown leaves)

This could be just drought - I don't know what your weather's been like there, but I'd guess its been hotter and drier than ours!
Fireblight is a risk with these shrubs, but this usually hits at flowering time, not once the berries have formed, and the whole plant would have a scorched or burnt appearance from the top down, so I'm going with the drought theory!

Many thanks Bamboo.....we had originally thought water shortage but the ground around the wall is always moist and no other plants nearby are affected.
Could this be some sort of disease at all?

fireblight's the only one I can think of, as I said in the earlier answer, it usually hits at flowering time - when did this start?
And you say the soil is always moist round the wall, but if it did dry out (the bottom of a wall is a very dry place to be) during the heatwave (if you had it, as we did), this may now be the result.

Thank you Michaella great to be here.
It is a flowering cherry but a miniature one ie not the Kanzan which we have at the other side of the garden.

Ggp - I think the answer you've given to Michaela is in the wrong place ....

Thanks Bamboo
Yes this started about 2 months ago. We didn't really have a heatwave although the weather is consistently about 2 or 3 degrees higher than the south coast but the area is never allowed to dry out.

Does the plant look scorched, as if its been burnt? If its just some of the branches, prune them all out and wait and see what happens. If it is fireblight, it will kill the shrub, and you will not be able to replant anything from the Rosacea family in the same spot.

All leaves have that curling and yes they look burnt and you can see the berries have just given up.
I pulled the plant up and although the wood was still 'soft' the root ball looked very small given the spread of the branches.

Dispose of it, don't compost, either burn or cut up and bag up. Hopefully, your other pyracanthas will be okay. If it is a north facing wall, how about planting a hydrangea petiolaris (or now called H. anomala) which is a climbing hydrangea instead? This is not a member of the Rosacea, so will be fine even if it was fireblight.

will get rid of it like that thank-you....you know we had a climbing hydrangea on the same wall and it didn't survive either.....should have learned the lesson then I guess!

Ah - well I'm still not sure its not a watering/planting issue - are you planting too close to the wall? Should be a minimum of a foot away, preferably 2