Williams was the first player into referee Curson's book for hacking down Johnson in the centre circle.
A fine run down the right by Clarkson ended with a good right-wing cross but the towering Broughton headed over from 12 yards when he should have done better. Drewe Broughton should have done better with a header
Chances were now at a premium after a very lively and open first half hour.
Southend's Bramble curled a cross-shot just wide from the right wing as the first half drew to a close.
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