Is county cricket's substitute rule working?

Is county cricket's substitute rule working?Image source, Getty ImagesImage caption, Jonny Bairstow is among the players to have been replaced this seasonByMatthew HenryBBC Sport JournalistPublished10 minutes ago1 CommentsAfter only two rounds of matches, the use of substitutes in county cricket is already causing plenty of debate.Nottinghamshire coach Peter Moores is one of those to have benefited from the change, but admits the laws need "tightening".Glamorgan captain Kiran Carlson rued the impact on his side - Notts brought in all-rounder Lyndon James for injured seamer Fergus O'Neill on the final morning and he took two wickets in a 192-run win - but says he would have done the same as his opponents."A guy who hadn't played cricket for three days to then come in and bowl, obviously that's an advantage," Carlson said."The thinking behind bringing in the rule is sound, but I think it has to be ironed out in terms of the way it does get done."How have we got here and what change might be needed?What has happened so far?The trial follows similar experiments in domestic cricket in India, Australia and South Africa after the International Cricket Council asked members to test the use of fully participating substitutes with a view to an introduction in Tests, something previously only allowed for concussion and Covid-19.The England and Wales Cricket Board (ECB) has taken the trial a step further than those countries by allowing replacements for "significant life events", such as bereavements or the birth of a child, as well as injury and illness.Replacements can come into the match at any point from after the first ball to before the last.In the case of injuries, replacements must be signed off by the match referee in conjunction with the club medical staff. Replacements for life events - not used so far - have to be agreed by the county chief executives of the two teams.The ECB anticipated there would be inju...