closing the stable door after the horse has bolted

closing/shutting the stable door after the horse has bolted

trying to stop something bad happening when it has already happened and the situation cannot be changed Improving security after a major theft would seem to be a bit like closing the stable door after the horse has bolted.
References in periodicals archive ?
Waiting until children reach mid teenage years is too late and mirrors closing the stable door after the horse has bolted.
This is closing the stable door after the horse has bolted.
So while he now faces condemnation, isn't it rather a case of closing the stable door after the horse has bolted -twice?
TALK about closing the stable door after the horse has bolted, but it really is hard to build up any enthusiasm about today's early-price event at Fakenham (3.
I find Rhodri Morgan's tour of West and North Wales a bit like closing the stable door after the horse has bolted.