John Bishop revealed his Christmas Day was wrecked after he and his wife were informed they both had Covid-19.The funnyman and his beloved Melanie were given their positive test results - and said the virus had knocked them both for six.The 54-year-old took to Instagram to share a screenshot of his NHS result and told fans all about the symptoms they have both been suffering with.The comedian wrote: "This came through on Christmas Day. "This is the worst illness I have ever had, debilitating headaches, muscle joint and even skin pain, dizziness, nausea, no appetite, incredibly chronic fatigue." John added: "My wife and I are fit non-smokers and it's flattened us.