The value null can appear in field values - both simple values, arrays and sub-objects. This has been noted before specifically for dates and addresses but I’ve come across a few more in various other fields. Examples (from a fairly old data entry) clipped for clarity - these appear fine when viewed at beta.companieshouse.
Company number 00386204.
/company/00386204/filing-history/
{
"items":
[
{
"links":
{
"document_metadata": "https:\/\/document-api.companieshouse.gov.uk\/document\/bUXCeXe741c3-Mv1zK3BTOxapzWT_0YsW-ULHNr4hak",
...
},
"barcode": null,
...
},
{
"links":
{
"document_metadata": "https:\/\/document-api.companieshouse.gov.uk\/document\/NfSr8xpiFQJyEb1luElZvPDcIvHy2TO4-IRQ-sz1jIg",
...
},
"barcode": null,
...
},
...
]
}
/company/00386204/insolvency/
{
...
"status": null
}
Previous mentions of “unusual” data: