Link to non-existent filing history list - UK Establishment

Minor oddity - I’ve found the following entry which appear in the links object in the company profile object which doesn’t not exist.

https://api.companieshouse.gov.uk/company/BR013959 returns:
{
“company_number” : “BR013959”,
“etag” : “a766f587af3947029eed61c62dbe1f4d624c015c”,
“links” : {
filing_history” : “/company/BR013959/filing-history”,

},

}

…but there’s (as I’d expect) nothing in the linked filing history.
“https://api.companieshouse.gov.uk/company/BR013959/filing-history”
{
“items_per_page” : 25,
“filing_history_status” : “filing-history-available”,
“start_index” : 0,
“items” : [ ],
“total_count” : 0
}

I presume (not certain) that UK establishments in general don’t have a filing history e.g. filings are listed under the parent overseas company number?