David Walliams has made the most of lockdown restrictions easing and has treated the most important woman in his life to a lovely "date night" – his mother Kathleen.MORE: David Walliams films inside stunning London homeThe comedian shared a sweet photo on Tuesday night, showing him with his arm around his mum whilst inside a restaurant – something that has only been allowed since Monday. WATCH: David Walliams makes rare comment about son"Date night," David captioned the sweet snap.Fans couldn't