Your source is behind a paywall, and I'm not interested in paying the Telegraph, but it seems there's a factual inaccuracy in your statement - the electoral commission did not 'come up with nothing'. They imposed a fine, referred Vote Leave to the police, and Vote Leave dropped their appeal.
https://www.electoralcommission.org.uk/media-centre/vote-lea...
https://www.theguardian.com/politics/2019/mar/29/vote-leave-...