The message
from Lynda Thornton contains these words:

Hi

My small conifer (3-4 feet high) has suddenly become absolutely thickly
infested with grey aphids. This seems to have happened almost
overnight!

They are so bad I think they might kill the tree if I don't do something
- what would be recommended for this?

Hang a peanut feeder on it. Birds will come for the nuts and find and
clear the aphids as swiftly as they appeared. I've done this and it
works even on large conifers.

Janet.