Network Rail apologises to passengers after sinkholes lead to delays for people travelling to and from Gatwick Airport. Multiple reports say the incidents disrupt normal rail services, affecting journeys during the period when the sinkholes were identified and dealt with. The operator expresses regret for the inconvenience experienced by passengers and indicates that disruption is linked to the condition of the rail infrastructure at the affected location(s). While exact details of where the sinkholes occur and how long delays last are not specified in the provided excerpts, the common element across the reports is that the sinkholes are the cause of the disruption and that Network Rail issues an apology to those impacted. The reports frame the apology as a response to passenger delays and the resulting disruption to travel plans for Gatwick-bound services.