SNP, UKIP and Green parties see membership increases

Membership of political parties has been waning in the UK for years, but some of the smaller parties have been bucking the trend, with the SNP, UKIP and Greens seeing more voters turning to them.

In a Daily Politics film, Adam Fleming looked at how millions of people used to be signed up, but the parties with the most MPs at Westminster are the ones shedding members today, with potential lessons from the National Trust.

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