England implode on chaotic first day that sees 20 wickets fall - as visitors trail by 46 runs after Boxing Day Test amid criticism of 'shocker' MCG pitch, writes LAWRENCE BOOTH

Twenty wickets fell on a helter-skelter first day's play in the fourth Ashes Test, as England staggered their way to 110 in response to Australia's 152, and pundits criticised the quality of the pitch.