Much like in the U.S. there has been a concerted effort to downplay or ignore evidence that Trump worked for the Russians:

Boris Johnson and Theresa May ignored claims the Kremlin had a “likely hold” over Donald Trump and may have covertly funded Brexit, the former spy Christopher Steele alleges in secret evidence given to MPs who drew up the Russia report.

In testimony to MPs, the MI6 veteran accused the government led by May and in which Johnson was foreign secretary for two years of turning a blind eye to allegations about Trump because they were afraid of offending the US president.

Steele first presented a dossier about Trump to senior UK intelligence figures in late 2016, who he says took it seriously at first. But, he writes, “on reaching top political decision-makers, a blanket appeared to be thrown over it”.

“No inquiries were made or actions taken thereafter on the substance of the intelligence in the dossier by HMG [Her Majesty’s government],” Steele says in the critical document.

Before you dismiss Steele because of the smears directed against him:

Former British spy Christopher Steele, whose controversial dossier roiled American politics, scored a major victory Thursday when an appellate court upheld the dismissal of a defamation lawsuit against him by two powerful Kremlin-linked Russian oligarchs.

If there is any slandering it’s by the Trump criminal syndicate:

The firm run by an ex-British spy and the author of the controversial dossier that was used to obtain surveillance warrants against a former Trump campaign official accused President Trump of making “false claims” about them while also standing behind the reporting in the spy’s much-panned dossier.

And if Steele’s allegations are untrue why hasn’t Trump sued the former MI6 officer.