| 22 Jan 2026 |
Venue Hire |
Ministry of Justice |
Calder Conferences |
£26.4m |
| 15 Apr 2025 |
External Venues |
Department for Environment, Food & Rural… |
Calder Conferences |
£20.4m |
| 16 Feb 2023 |
DfT Group Managed Service for Meetings and Event |
MCA - Maritime and Coastguard Agency |
Calder Conferences Ltd |
£19.0m |
| 9 Jan 2023 |
Provision of Corporate Contact Venue Hire |
Crown Commercial Service |
Calder Conferences Limited |
£18.0m |
| 5 Mar 2025 |
Venue Find Services RM6342 Lot 3 2025 |
Ministry of Defence |
Calder Conferences Ltd. |
£13.4m |
| 16 Jan 2026 |
Meetings, Conferences & Events |
NUCLEAR DECOMMISSIONING AUTHORITY |
Calder Conferences limited |
£7.0m |
| 24 Aug 2022 |
Provision of Travel and Venue Solutions - Lot 1 |
Crown Commercial Service |
TRAVELPERK UK IRL LIMITED +2 |
£4.7m |
| 25 May 2022 |
Booking Solution Venue and Events |
UK SHARED BUSINESS SERVICES LIMITED |
Calder Conferences |
£4.5m |
| 4 Feb 2026 |
Venue Find and Supporting Services for Meetings, Conferences and Events |
Department for Education |
Calder Conferences |
£4.0m |
| 21 Jul 2026 |
Booking Service for Meetings and Events |
NHS Blood and Transplant |
CALDER CONFERENCES LIMITED |
£3.7m |
| 22 Sep 2025 |
Conference Venue BookingEngland |
HM Land Registry |
Calder Conferences Limited |
£3.5m |
| 9 Feb 2026 |
Conference Booking |
Office for National Statistics |
CALDER CONFERENCES LIMITED |
£2.6m |
| 3 Feb 2026 |
Venue Booking Services (2026-2030) |
DWP |
Calder Conferences Limited |
£2.1m |
| 9 Jan 2025 |
Provision of Booking Solutions Venues & Events Services |
NHS Supply Chain Coordination |
Calder Conferences Limited |
£2.0m |
| 26 Feb 2026 |
Provision of Venue Conference and Event BookingsNorth West |
Crown Commercial Service |
CALDER CONFERENCES LIMITED |
£1.5m |
| 5 Mar 2026 |
HMT Venue Hire and Event Planning |
HM TREASURY |
CALDER CONFERENCES LIMITED |
£1.2m |
| 23 Feb 2026 |
Venue Management ServicesEngland |
NHS England |
CALDER CONFERENCES LIMITED |
£1.2m |
| 23 Feb 2026 |
Venue Management ServicesEngland |
NHS England |
CALDER CONFERENCES LIMITED |
£1.2m |
| 16 Jan 2025 |
Contract Variation- Contract Extension |
Defence Science and Technology Laboratory |
Calder Conferences Limited |
£1.1m |
| 16 Jan 2026 |
Venue Sourcing Services for Ordnance Survey |
ORDNANCE SURVEY LIMITED |
Calder Conferences |
£1.0m |
| 28 Nov 2025 |
External Venues Booking - Expiry 2028Yorkshire and the Humber |
The North Yorkshire Council |
Calder Conferences Limited |
£842k |
| 15 Oct 2025 |
UKEF Meeting and Venue Hire |
UK EXPORT FINANCE |
Calder Conferences |
£780k |
| 29 Aug 2025 |
Venue Find & Supporting Services for Meetings, Conferences & Events |
OFCOM |
Calder Conferences Ltd |
£600k |
| 13 Apr 2026 |
CSP26014 - Acas27454 - Venue Hire |
UK SBS |
Calder Conferences Limited |
£550k |
| 15 Apr 2025 |
Venue Hire |
Gambling Commission |
Calder Conferences |
£500k |
