Mark Gardner

Mark Gardner is not mentioned in either of the provided news articles. The articles focus on antisemitic incidents in the UK. One article reports on an arson attack on Jewish community ambulances in London, which is being treated as an antisemitic hate crime. The other article discusses a spike in antisemitic incidents following a deadly attack on a Manchester synagogue. Neither article provides any information about a person named Mark Gardner. Therefore, it's impossible to provide any information about who he is, why he's newsworthy, or his current relevance based on the given context.