In theory you could do it in about 24 hours if you were very quick and very lucky. But realistically the shortest would be if you gave a TOC 4 weeks pre-notice so they can arrange for the resources to be on standby and check for engineering works, and then ideally you'd want 1 week to allow NR time to get the path in and then communicate the key times back to the club so they can tell supporters. The later you leave it, of course, the bigger the risk of getting declined outright or a really rubbish path.How much notice would be required to arrange such specials? Ten days enough in the case of Coventry City?
Avanti have sometimes bid for Footexes at short notice as well, but then they have existing football plans they can largely pick up and send straight in.