The text from the government website has been re-drafted to help your understanding.
To be eligible your house:
must not have already received the connection supported by the voucher or any other publicly funded Scheme; must be in a location where there is no pre-existing broadband connection offering speeds of more than 2 Mbps (most of you can not get more than 2Mb Swale Life will already have informed you if you can); and must be in a location where a broadband connection offering speeds of more than 2 Mbps supported by any form of public funding is neither already available nor planned in the next 12 months (there are no plans for upper swaledale).
You must enter into a new contract or agreement for at least 12 months with a supplier registered to the Scheme (Swale Life contracts are 12 months).