When searching "CIRCULAR N°53.299756.2024", the results are as below.

The first listed result is the desired output, as clicked through to below.

But when adding "GE" at the end of the search query (as in the desired result output, see above), the desired result disappears completely, as below. A bunch of General Electric results follow (which I understand, given the GE acronym, but the initial desired result which contains "GE" should not disappear given the supposedly perfect match).
Worth noting that in addition to the above, a bunch of unrelated UK Government sites are listed as results for both search queries.
Searching from the UK, server is EUROPE-WEST2.