From that other site courtesy of "Crosswind":
G-OOBL went tech in Cancun on Tuesday morning.
This resulted in a 22 hour delay to Wednesday's Gatwick-Varadero, which departed this morning on G-OOBL. To eliminate the knock-on delays, G-OOBK had to be positioned down to LGW this morning to operate the Porlamar (on-time) and the Manchestet-Sanford flight was downgraded to a 757 (G-OOOK) via Bangor but is operating on-time as well.