If by "banked" you mean deposited in a savings account or exchanged for modern currency, no. All predecimal coins have long been demonetised and are no longer legal tender.
Even demonetised decimal coins such as the Half New Penny, the old style 5 Pence, 10 Pence and 50 Pence coins, might only be accepted by a bank from an account holding customer and exchanged for coins of an equivalent value, but banks are under no obligation to do this.
If you have predecimal coins that you want to get rid of, and they are in good condition, you may be better off taking them to a coin dealer.
No. All British predecimal coinage is no longer Legal Tender. The 1965 British Crown is probably worth more as a collectible coin.
A Sixpence was a small predecimal British coin. Half a Sixpence was a Threepence, an even smaller predecimal British coin.
340 decimal British Pounds converts to 34,000 decimal British Pence. 340 predecimal British Pounds converts to 81,600 predecimal British Pence.
None. A Threepence represented three Pennies in the various British based predecimal currencies. There were 240 predecimal Pennies in a predecimal Pound, so there were 80 Threepences in a predecimal Pound. At the time of Britains changeover to decimal currency in 1971, the old redundant Threepence became the equivalent of 1.25 New Pence. There are 100 New Pence in the British decimal Pound.
If you refer to the predecimal British Halfpenny, it was written as 1/2d.
There are 100 Pence in the current British Pound. There were 240 Pence in the predecimal British Pound.
All British predecimal Pennies, Halfpennies and Farthings minted since 1860 are bronze.
The copper content of 20th century British predecimal Pennies, Halfpennies and Farthings varied from 95.5 to 97%. When the use of silver in coins was discontinued after 1946, all British "silver" coins were made from a copper-nickel alloy consisting most commonly of 75% and 25% nickel.
All British general circulation predecimal Pennies, Halfpennies and Farthings were made from bronze from 1860 to 1967.
There was no 1970 British Crown (Five Shilling) coin minted. The last British predecimal Crown (Five Shilling) coin to be minted was in 1965.
Silver and gold
The British have never used the cent as a part of their coinage.