1 of 12
England begin the fourth day needing 395 to avoid the follow-on but again the weather conditions don't look promising

2 of 12
Shaun Pollock and the South African attack give England a testing time during the opening hour

3 of 12
Makhaya Ntini makes the breakthrough, bowling Marcus Trescothick with a superb yorker

4 of 12
Vaughan rocks back onto the back foot to pull Ntini as England reach 109-1 at lunch

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South Africa wicket-keeper Mark Boucher struggles to get his gloves on a lively delivery

6 of 12
Ntini celebrates his second wicket after trapping Mark Butcher lbw for 13

7 of 12
England captain Nasser Hussain is dismissed lbw for just one run after unwisely leaving a Pollock delivery

8 of 12
Vaughan guides England through their mini-wobble and goes on to reach his ninth Test century

9 of 12
Anthony McGrath contributes 34 to a 89-run partnership with Vaughan before being caught at gully

10 of 12
Next man in Alec Stewart mistimes a stroke onto his own knee and has to call for a McGrath as a runner

11 of 12
Vaughan's innings ends on 156 when he edges a delivery from Dewald Pretorius (left) behind

12 of 12
Stewart walks in the next over, then Andrew Flintoff goes for 40 before the close - England now need 21 to avoid the follow-on