Poorly palm (Nannorrhops Ritchiana??)

Not been looking too good for some time.
It's about 15 years since planting as a 2' plant... now with a 5' or more trunk.
Location.... south facing garden in north Somerset.
Please see the photos for the issue.
Thanks

 

Not a palm I've come across but the leaf problems seem the same as my Chamaerops humilis.
They always seem to get brown spots over winter.
Are you sure you have the correct ID.
Removing some of the dead fronds might help to stop the problem spreading so much.

 

Thanks Pete / JWK.
My ID was from having Google Lens look at the pics
I'll take a couple more pics that might help.

Lovely sunny day so I'll get out there and try and do some more pruning of dead fronds.... could do with chain armour for the job as the frond stems have the sharpest needle like spikes their full length!

Watch this space ;-)

 

I think the spines on the frond stalks suggests it probably Chamaerops.

 

I've had a Chamaerops in a container for about five years. It was developing those sickly spotted leaves to the point when I considered consigning it to another destination! Instead I repotted it with soil based compost, added some slow release fertiliser granules and it revived quite dramatically. With yours in the ground @AndyW_InUK, I would remove all the dead, untidy, spotty leaves, scrape away the gravel around the base to reveal a good area of soil, enrich the soil with organic matter like farmyard manure, or soil conditioner, add a few handfuls of blood, fish and bone, replace the gravel and water well. It should revive over the next growing season..