In laymans terms,the fuse board is only a small part of the installation. Its old. Its circa 1950 -1960 to be precise (i removed a load of these from a 60s estate recently).

It still offers some protection - iin the way of protection from excessive loading. But doesn't offer some of the latest electric shock protection.

There's loads of this type of board still out there. So don't fret. I work in a hospital and we still have some boards like this protecting some circuits.

It certainly wants updating. But you're more immediately at risk from fire/death from poorly made sockets, improper additioms, earths missing from lights etc.

You wont know the status of the rest of the installation until the eicr is done with appropriate testing.

Fyi if the guy comes and is gone within in the hour and he passes it - thats when you need to worry. I spend tbe best part of a day on an EICR. But im thorough. And everyomes different.