Yew are not happy

Hi all,
Another long time friend in the garden is my mixed yew/holly hedge. Nothing but a light trim now and again, it’s been there at least 13 years…now it’s going yellow - well, two of the yew at the slightly higher end are. The holly and the rest of the yew are fine, so far.

The two pale ones have started losing needles too.
1. What’s distressing it?
2. Is it a gonner?
3. What can I do before putting in a new yew, or a new something else?
Cheers all
Joe
Another long time friend in the garden is my mixed yew/holly hedge. Nothing but a light trim now and again, it’s been there at least 13 years…now it’s going yellow - well, two of the yew at the slightly higher end are. The holly and the rest of the yew are fine, so far.

The two pale ones have started losing needles too.
1. What’s distressing it?
2. Is it a gonner?
3. What can I do before putting in a new yew, or a new something else?
Cheers all
Joe
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Posts
Other than that, I agree with @JennyJ that it is probably suffering from lack of water and soil depth.
The site looks very heavily planted, and as @JennyJ says - it's all sandwiched in between hard landscaping. Drought is far more likely than excess water
My two thoughts are that the damage was done with the heavy down pours over the last few years. 1. About ten metres away (down hill, slightly) is my garage which flooded correspondingly as the soak aways could not cope, nor could my neighbours guttering which overflowed in waterfalls to my garage. Although this may be too far away with too many other trees in between to be relevant. 2. The roots of the other mature and larger trees have taken over.
While the original planting and hard landscaping was…um, optimistic…nothing has changed since we’ve lived there.
Fingers crossed.
Its dead as a door nail.