We have spending limits in the UK, so the amount that Labour and Tories can spend is roughly the same.

I've had 6 weeks of adverts aimed at a target tory/labour seat I live very close to in the North West, all from 3rd parties. The first 5 weeks it was mainly unknown groups like "Working for UK" and "Campaign Against Corbyn", all personal attack adverts on Corbyn (leader of the labour party), and when I dig deep I find the people behind these new companies (often set up in the last month or two) are people like a Conservative Councillor in London, or an Ex Conservative MP from Surrey.

In the last week there have been some "tactical voting" adverts from more establish groups (peoples vote etc)

I guess this is a way for the conservatives to get around spending limits, I guess like U.S. "Super Pacs"