LUMEN TECHNOLOGIES UK LIMITED

• ◆

  3 officer resignations in last 12 months

  Multiple officers have left the board recently — see the People section for who.

Values shown as filed in the company's annual accounts. — indicates the figure wasn't present under that line item in that period. About these numbers

• Turnover

  +9.9%

  £327,510,000 → £359,828,000

• Cash

  —

  Not reported

• Net assets

  +41%

  £168,881,000 → £238,180,000

• Employees

  -13.4%

  903 → 782

• Operating profit

  +2,069%

  £145,000 → £3,145,000

• Profit before tax

  +36.5%

  -£6,032,000 → -£3,830,000

• Wages

  -16.4%

  £72,951,000 → £60,974,000

Each % is (latest − prior) ÷ |prior| for the line item as filed. The comparison is only shown when the latest and prior accounts cover broadly equal-length periods — short or long stubs (typical around incorporation or a year-end change) are suppressed rather than misrepresented. Lines a company doesn't report are omitted. About these numbers

Margins divide P&L lines by turnover. Gearing is liabilities over total assets. Current ratio is current assets over creditors falling due within one year. Interest cover is operating profit over absolute finance costs. Sector-distribution context coming next.

1. LUMEN TECHNOLOGIES UK LIMITED 2021-04-03 → present
2. CENTURYLINK COMMUNICATIONS UK LIMITED 2018-01-31 → 2021-04-03
3. LEVEL 3 COMMUNICATIONS UK LIMITED 2012-08-30 → 2018-01-31
4. GLOBAL CROSSING (UK) TELECOMMUNICATIONS LIMITED 2000-01-17 → 2012-08-30
5. RACAL TELECOMMUNICATIONS LIMITED 1997-08-11 → 2000-01-17
6. RACAL - BR TELECOMMUNICATIONS LIMITED 1995-12-22 → 1997-08-11
7. BR TELECOMMUNICATIONS LIMITED 1990-04-25 → 1995-12-22

Accounting basis

IFRS

Reporting scope

Standalone (parent only)

Auditor

Pricewaterhouse Coopers LLP

Audit opinion

Unqualified (clean)

Going concern

Affirmed

“The Directors have performed a going concern assessment which indicates the Company will require additional funds through the above arrangements to meets its liabilities, as they fall due during the 12 months following the date of approval of the financial statements. In performing this assessment, the Directors have considered the performance of the Company going forward, and the available liquidity of the group headed by Colt Group Holdings Limited, and have determined that, due to the expected support from the group, they believe that the Company is well placed to manage its financing and future commitments over a period of at least 12 months from the date of approval of the financial statements. Colt Group Holdings Limited has indicated its intention to provide such financial support as is necessary to enable the Company to meet its liabilities as they fall due, and that it does not intend to seek repayment of the amounts currently due to the group for a period of at least twelve months from the signing date of these financial statements.”

Group structure

1. LUMEN TECHNOLOGIES UK LIMITED · parent
   1. Fibernet (UK) Limited 100% · England · Telecommunications services

Significant events

• “On 16 April 2025, the Group entered into an agreement to sell six data centres across key European cities to a data centre provider, headquartered in the Netherlands. In addition, the Group has divested two data centres in London to a UK-based data centre operator. The sale was completed on 1 September 2025.”
• “In mid-August 2025, Colt detected a cyber incident affecting one of its internal business support systems. As a precautionary measure, certain systems across the Colt Group were proactively and temporarily shut down.”

Auditor, going-concern and subsidiary information is drawn from the narrative of the latest annual accounts. About these numbers

Filings

6

last 12 months

Capital events

2

last 24 months

Officers appointed

1

last 12 months

Officers resigned

3

last 12 months

Direct counts from the register. No score, no rating — see the Filing timeline for the underlying events.