Pam Moore wrote:
Has anyone any first hand experience of harlequin ladybirds?
A friend of mine has asked me to ask you for help on behalf of a
friend of hers.
This lady lives on the end of a row of houses in Bradford on Avon.
She is beseiged by the things, even getting in her house through open
windows. Nobody else in the row of houses has seen them.
Will the winter kill them off? Is there anything which can be done.
I've suggested they Google them but have not done so myself.
Help please?

Just leave them alone. Yes, they are an invasive species, and will
probably wipe out our native ladybirds in due course. BUT like our
native ladybirds they have a voracious appetite for pests like aphids
and scale insect., only even more effective due to their greater
numbers. They are here to stay now so accept them. They are not a threat
to your health, your plants or food crops. Oh, and they are pollinators too.