Transparency of Lobbying, Non-Party Campaigning and Trade Union Administration Bill

Is this not a fundamental threat to democracy? Let us take an English example. One party wants an extra runway at Heathrow. That is opposed by another party. If this is going through during an election year, surely campaigning groups should not be hindered in any way. They should have no curb on their election expenditure at all. It is a fundamental fact of democracy. They should be allowed to campaign.