Sarah wrote

Can anyone please offer any advice regarding my potted conifer which has
started to go brown and brittle. Its not all over, just at the back of
the conifer which faces the wall. What if anything can I do to restore
it to its original lovely green condition.

Conifers do not like to be shaded and one next to a wall will always die
back on that side, they do the same if you allow another plant to grow next
to them. If there is no green showing then that bit is dead and will never
regrow.

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Regards
Bob
In Runnymede, 17 miles West of London