Just thinking about this.....but Percy Main deppt I'd say is at big risk of closing for exactly the following reasons:

1.) Most routes other than the 307 & 309 (moved to Riverside) can easily be covered in parts or wholly by alternative services (352, 354, 355 vs 37, 38, 359 X7, X8, X63) or alternative operators (1, 41/41A, 335 (NEXUS), 351(NEXUS), 353, 359(NEXUS)).

2.) If a joint ZEBRA bid is submitted with the authorities, Arriva and GNE for the Coast Road corridor, that would effectively confirm Percy Main closing as I doubt the needed infrastructure could easily be implemented at Percy Main without a whole new depot. And even if GAG got offers if the new nearby housing development wanted to expand further down, I doubt GNE would re-invest in a new depot and instead, would pocket the money to pay down the COVID losses.