| Trafford Council EN | North West | generic | Weekly | Pending | 0 |
| TransPennine Trains Ltd EN | North West | delta | Weekly | Broken | 0 |
| Transport for London EN | London | bravo | Weekly | Broken | 0 |
| Transport for Wales Rail Limited (Utility Buyer) WL | Wales | atamis | Weekly | Today | 28 |
| Trinity House EN | London | delta | Weekly | Today | 62 |
| Truro & Penwith College EN | South West | in-tend | Weekly | Broken | 0 |
| Tunbridge Wells Council EN | South East | generic | Weekly | Pending | 0 |
| UK Hydrographic Office EN | South West | delta | Weekly | Today | 17 |
| UK Industrial Fusion Solutions Ltd EN | South East | delta | Weekly | Broken | 0 |
| UK Research & Innovation (UKRI) EN | South West | atamis | Weekly | Today | 151 |
| Ukfe (Delta eSourcing portal) EN | South East | delta | Weekly | Today | 115 |
| University of Bedfordshire EN | East of England | in-tend | Weekly | Today | 10 |
| University Of East Anglia EN | East of England | in-tend | Weekly | Broken | 0 |
| University of Greater Manchester EN | North West | in-tend | Weekly | Broken | 0 |
| University of Greater Manchester EN | North West | in-tend | Weekly | Broken | 0 |
| University Of Lancaster EN | North West | in-tend | Weekly | Today | 7 |
| University Of Liverpool EN | North West | in-tend | Weekly | Broken | 0 |
| University of Portsmouth Higher Education Corporation EN | South East | in-tend | Weekly | Today | 7 |
| University Of Reading EN | South East | in-tend | Weekly | Broken | 0 |
| University of Salford EN | North West | in-tend | Weekly | Today | 23 |
| University Of Sheffield EN | Yorkshire and the Humber | in-tend | Weekly | Today | 21 |
| University of Southampton EN | South East | in-tend | Weekly | Broken | 0 |
| University of St Andrews EN | Scotland | in-tend | Weekly | Broken | 0 |
| University Of Warwick EN | West Midlands | in-tend | Weekly | Broken | 0 |
| University Of Winchester EN | South East | in-tend | Weekly | Broken | 0 |
| University of Wolverhampton EN | West Midlands | bravo | Weekly | Today | 1 |
| University of Worcester EN | West Midlands | in-tend | Weekly | Today | 8 |
| University of York EN | Yorkshire and the Humber | in-tend | Weekly | Broken | 0 |
| Uttlesford Council EN | East of England | generic | Weekly | Pending | 0 |
| Vale of Glamorgan Council WL | Wales | generic | Weekly | Pending | 0 |
| Vale of White Horse Council EN | South East | generic | Weekly | Pending | 0 |
| VIVID Housing Ltd EN | South East | in-tend | Weekly | Today | 28 |
| Wales & West Utilities Limited WL | Wales | bravo | Weekly | Broken | 0 |
| Wales and West Housing Association Ltd WL | Wales | bravo | Weekly | Broken | 0 |
| Wales and West Housing Association Ltd WL | Wales | bravo | Weekly | Broken | 0 |
| Walsall Housing Group Limited EN | West Midlands | in-tend | Weekly | Broken | 0 |
| Waltham Forest Council EN | London | generic | Weekly | Pending | 0 |
| Wandsworth Council EN | London | generic | Weekly | Pending | 0 |
| Warrington Council EN | North West | generic | Weekly | Pending | 0 |
| Warwick Council EN | West Midlands | in-tend | Weekly | Broken | 1 |
| Warwickshire County Council EN | West Midlands | in-tend | Weekly | 7d ago | 1 |
| Watford Council EN | East of England | generic | Weekly | Pending | 0 |
| Waverley Council EN | South East | generic | Weekly | Pending | 0 |
| Wealden Council EN | South East | in-tend | Weekly | Broken | 5 |
| Weaver Vale Housing Trust Limited EN | North West | in-tend | Weekly | Broken | 0 |
| Welwyn Hatfield Council EN | East of England | generic | Weekly | Pending | 0 |
| West Berkshire Council EN | South East | in-tend | Weekly | Today | 8 |
| West Devon Council EN | South West | generic | Weekly | Pending | 0 |
| West Dunbartonshire Council SC | Scotland | generic | Weekly | Pending | 0 |
| West Lancashire Council EN | North West | generic | Weekly | Pending | 0 |
| West Lindsey Council EN | East Midlands | in-tend | Weekly | Today | 11 |
| West Lothian Council SC | Scotland | generic | Weekly | Pending | 0 |
| West Midlands Employers EN | West Midlands | in-tend | Weekly | Broken | 0 |
| West Midlands Fire and Rescue Authority EN | West Midlands | in-tend | Weekly | Today | 14 |
| West Midlands Growth Company Limited EN | West Midlands | in-tend | Weekly | Today | 7 |
| West Midlands Growth Company Limited EN | West Midlands | in-tend | Weekly | Broken | 0 |
| West Oxfordshire Council EN | South East | generic | Weekly | 8d ago | 0 |
| West Suffolk Council EN | East of England | generic | Weekly | Pending | 0 |
| West Sussex County Council EN | South East | atamis | Weekly | Today | 51 |
| Westminster Council EN | London | bravo | Weekly | Broken | 62 |
| Westmorland and Furness Council EN | North West | generic | Weekly | Pending | 0 |
| Wigan Council EN | North West | eusupply | Weekly | Broken | 63 |
| Wiltshire Council EN | South West | generic | Weekly | Pending | 0 |
| Winchester Council EN | South East | eusupply | Weekly | Today | 26 |
| Windsor and Maidenhead Council EN | South East | generic | Weekly | Pending | 0 |
| Wirral Council EN | North West | generic | Weekly | 35d ago | 10 |
| Wm5G Limited EN | West Midlands | bravo | Weekly | Today | 14 |
| Woking Council EN | South East | in-tend | Weekly | Broken | 5 |
| Wokingham Council EN | South East | procontract | Weekly | Today | 244 |
| Wolverhampton Council EN | West Midlands | procontract | Weekly | Today | 221 |
| Worcester Council EN | West Midlands | generic | Weekly | 9d ago | 0 |
| Worcestershire County Council EN | West Midlands | in-tend | Weekly | Today | 88 |
| Worthing Council EN | South East | generic | Weekly | Pending | 0 |
| Wrexham Council WL | Wales | generic | Weekly | 7d ago | 0 |
| Wychavon Council EN | West Midlands | generic | Weekly | Pending | 0 |
| Wyre Council EN | North West | generic | Weekly | Pending | 0 |
| Wyre Forest Council EN | West Midlands | generic | Weekly | Pending | 0 |
| York Council EN | Yorkshire and the Humber | generic | Weekly | Pending | 0 |
| York Teaching Hospital Facilities Management LLP EN | Yorkshire and the Humber | atamis | Weekly | Broken | 0 |
| Ypo2 (Atamis portal) WL | Yorkshire and the Humber | atamis | Weekly | Today | 267 |