British Coins In Circulation

Which pound sterling coin has the greatest relative value in metal?
Call me weird, but due to the state of the British economy, I have deceided that I am going to keep as few as possible notes, and as little money as possible in banks, and I am going to just keep coins. In the extremely unlikely yet possible event of extreme hyperinflation, like what happened to the German Mark after the First World War, I don’t want my money to become practically worthless. If the value of the print of the royal mint on the coin become virtually worthless, I would still like the value of the metal used in the coin to be of value. So my question is, which of the normal coins currently in common circulation is worth the most in raw metal in relation to the value printed on it. In other words, if I had £1,000, would that £1,000 be worth the most as plain metal melted down if I had it all in 1ps, 2ps, 5ps, 10ps, 20ps, 50ps, £1s or £2s? And before anyone points it out, I know that it is illegal to melt down modern coins which are in circulation.
I’d guess it is the 2p coin as copper is pretty valuable nowadays, it was about $4,000 a ton last year.
Rare Undated 20p British Coins in circulation