How many versions of the Electoral Register are there?

There are two versions of the electoral register in the UK:
i) The Full Electoral Register: This is the complete list of everyone who is registered to vote. It is used for conducting elections, preventing and detecting crime, and for checking credit applications. By law, political parties, candidates, and elected representatives are provided with the full register to use for electoral purposes, such as sending out election materials. You cannot remove your details from this register.
ii) The Open Register: This is an extract of the electoral register that is available for anyone to buy, including businesses, charities, and individuals. It can be used for a variety of purposes, such as marketing and verifying identities.