@ Richard
Looking at some Google search results for your site:
site:https://infoshield.co.uk/searches/auctioneers/
It appears that some entries are indexed in the search results as the business name followed by infoshield (not sure it can be swapped the other way round).
Many are | Buy sell antiques|Locate Auctioneers|Infoshield UK | Infoshield UK
. Impossible for me to know, but my guess, this is being done by AIOSEO since it overrides core WP page titles.
Impossible for me to know if business name followed by infoshield are the original indexed page titles or the other is. But, my guess is that business name followed by infoshield are the original Google indexed. If that is the case, I would suggest undoing whatever settings changes were done to make the page titles all | Buy sell antiques|Locate Auctioneers|Infoshield UK | Infoshield UK
.
Not sure this helps, but I hope it does!