I think the biggest problem is that single-issue parties never gain widespread support. I may be interested in internet privacy and technology issues but I migh

I think the biggest problem is that single-issue parties never gain widespread support. I may be interested in internet privacy and technology issues but I might also be interested in education, transport, housing, the economy and many other issues. If these subjects are secondary (or presented as secondary) to your party's main focus, how can you ever gain broad support among the electorate? Unless the real goal of starting a party is to make the main political parties sit up and take notice of the issues you're campaigning for. The alternative to creating a party is to create a campaigning body or organisation - which of course may struggle to get noticed. Raising and highlighting important public issues, questioning official claims is also the role of the press, but we can never expect that from the utterly abysmal UK press.