I think that the passengers will not be as vulnerable to disruption as people think.The last few wildcat strikes that were carried out by the plebs in lhr over the last few years caught everyone by surprise and there was no just cause behind them.Since these strikes are official the company will know what days and time period the strikes will be going on for and therefor will be able to accomodate the pax on alternative flights reducing the any impact on the image of the company.Even the passengers have noticed the deterioration of customer service provided and the declining moral of the staff since the leprechaun arrived at waterworld