September Sale 2025 Snap them up before they go! Portsmouth Guildhall Great value, exclusive offers Don't miss out on the top deals in our 2026 September Sale. Choose from the great selection below and get your ticket to good times! Please note these offers are valid until 23.59 on Tuesday 30th September. Tickets are limited on some offers. £5 Off Tickets Get £5 off tickets to selected shows at the Guildhall. Enter code: SEPFIVE. 2-4-1 Tickets Get 2-4-1 tickets for selected shows at the Guildhall. Enter code: SEP241 20% Off Get 20% off with this limited time Conferencing offer.