UC availability on LAS - LGW 23/9

Hi all,
Although for this year's jaunt we're flying out UC (via SFO), at the time of booking we decided to opt for PE on the return flight from LAS - LGW. Now we've decided we'd like to splash out for UC on the return, happy to pay for it. The trip was booked through VH so I've spoken to them to ask if we can upgrade. They say they have no more UC allocation but perhaps on the day we could ask for an upgrade and see what price they offer? Fair enough, understand that VH only have a certain seat allocation on each VS flight, but what do people reckon the chances are of there being two spare suites on VS044 on Fri 23/9 that they would offer up to cash upgraders like us? My feeling is probably not much chance, what with it being an LGW config 747! [?]
Although for this year's jaunt we're flying out UC (via SFO), at the time of booking we decided to opt for PE on the return flight from LAS - LGW. Now we've decided we'd like to splash out for UC on the return, happy to pay for it. The trip was booked through VH so I've spoken to them to ask if we can upgrade. They say they have no more UC allocation but perhaps on the day we could ask for an upgrade and see what price they offer? Fair enough, understand that VH only have a certain seat allocation on each VS flight, but what do people reckon the chances are of there being two spare suites on VS044 on Fri 23/9 that they would offer up to cash upgraders like us? My feeling is probably not much chance, what with it being an LGW config 747! [?]