David Walliams' Big Swim: A Sport Relief Special | White Heat | Pramface | Catholics | The Sarah Millican Television Programme | The Singing DetectiveDavid Walliams' Big Swim: A Sport Relief Special9pm, BBC1After conquering the channel and cycling the length of the UK in previous Sport Reliefs, 2011 saw David Walliams attempt a brutal eight-day, 140-mile swim along the murky waters of the Thames. This hour-long speci…
