[spireitematt]

Well you can switch legally right to left or vice versa during the bowler's run up. Kevin Pietersen was the first to do it. It was ruled legal by the ICC. So we wasted one of our great weapons years ago and our batsman could really have messed up bowlers, captains and fielders ...... but never did.

Don't know whether an ambidextrous bowler can change hands and disguise which arm he intends to bowl with ......

Has to inform the Umpire before a delivery. I reckon ambidextrous bowling is rare. Left handed batsman can bowl right handed and left handed bowlers can bat right handed. I suppose it's what feel comfortable.