England must go for South Africa's jugular and show who's in charge

England must go for South Africa’s jugular on day four in Durban and turn their 261-run lead into a first Test victory, says Ian Botham. 

The tourists closed day three on 172-3 in their second innings after bowling South Africa out for 214 to earn a first-innings lead of 89-run despite Dean Elgar's unbeaten 118.
Spinner Moeen Ali (4-69) and seamer Steven Finn (2-49) provided strong support to Stuart Broad (4-25) before Nick Compton (49) Joe Root (60no) cemented England's advantage. 
"England have been exceptional," reflected Sky Sports pundit Botham. "They bowled magnificently this morning - they only needed two wickets by the time they got to the new ball.
"Stuart Broad led the attack magnificently and Moeen Ali picked up four wickets as well. Then the batsmen came out and did their job.
"England are 261 ahead with seven wickets in hand and Joe Root going well - not to forget James Taylor, performing again. They've done next to nothing wrong and keep marching on.
"This new England side must learn that when you get a side in this situation you do not back off but go for the jugular and say 'we're in charge'."