Last month a member of staff was sacked and police launched an investigation after around 2,000 treasures were reported “missing, stolen or damaged” over a “significant” period of time.

The museum has now said most are Greek and Roman gems and jewellery, and shared pictures of similar items.

Sixty objects have been returned.

In a statement, the museum added that 300 more had been “identified and [are] due to be returned imminently”.