51�Թ�

The grid gives the Australian a good chance to extend his championship lead over Norris, who had a tricky session.

But there are other tricky trends the government is less fond of pointing out, that others call "crises" - notably the country's debt, and our shifting demographics.

A Lord's pitch which had proved tricky for batters in the first two days - especially in the face of some truly top-class bowling - began to flatten out.

Australia skipper Cummins put his side's collapse down to a "tricky" Lord's pitch, and "disciplined" bowling from South Africa.

Getting the review right is a tricky balancing act.