RCD 80A, 0.03A, 240v - Made by GE ref 304/28031-601 if that helps

Yes. I wouldn't put a freezer on a 30mA RCD. OK, it might have also tripped
a 100mA, but it is less likely.

I don't know what earthing system you have. If you have TT currently:

You should probably upgrade to a 100mA time delay RCD split load or RCBO
system, with the freezer on its own dedicated MCB circuit covered only by
the overall 100mA trip.

An even better alternative is to enquire if your supplier offers TN-C-S
earthing. Then you can have the freezer circuit with no RCD at all. Then you
can pretty much guarantee it will get power after reconnection.

If you have TN-C-S or TN-S earthing:

You seem to have a non split load consumer unit with all circuits RCD
protected. This is no longer current practice partly for the reasons you
have found. You should change to a split load unit (or RCBO system) with
lighting and a dedicated freezer circuit NOT RCD protected.

Christian.