- Before
- Reviews tabletop results whose recovery times the room estimated, and hunts for the evidence behind each statement when a supervisor asks.
- Now
- Opens one service at a time as a chain under its clock, sees every recovery step cited, and signs a result or returns it with a reason code.
One impact tolerance breach, from the scenario clock to the board
A worked operational resilience example at Corvane Bank UK. Make a Faster Payment, for personal customers, has an impact tolerance of 4 hours. Yesterday a scenario test showed it would not hold if the payments gateway supplier were hit by ransomware. Here is Thursday, October 22, 2026, screen by screen, in the working solution.
- 01Thursday morning
Eleven services against their tolerances
Imogen Strachan · Head of Operational ResilienceImogen's morning opens on a few numbers: 8 of 11 important business services within tolerance, 2 outside and 1 not yet tested; 17 of 22 scenario tests done; 6 open fixes, 1 overdue. Each service shows its slowest tested recovery against a tick for its tolerance. The agents' overnight brief cites every line, including that both Faster Payments gateways now host in one cloud region.
- 02One click
The service as a chain, under its tolerance clock
Imogen StrachanMake a Faster Payment opens as a chain of six links: start the payment, check and approve, route through the payments hub, send to the scheme, post to the account, tell the customer. The Mapping agent built it from four systems of record, Service Owner Tom Ashworth confirmed map v14 on Oct 9, and Imogen checked it: 135 resources, from 34 people and teams to 8 third parties. Above the chain, a clock runs from 0 to 7 hours with the 4-hour tolerance marked.
Recovers in 6 h 10 m; outside tolerance by 2 h 10 m.
- 03Oct 21, 4:12 p.m.
A severe but plausible scenario, step by step
Callum Reid · Resilience AnalystCallum ran SCN-2026-18 from the 2026 test plan with the Scenario agent: Brackmoor Payments, which runs the primary Faster Payments gateway, has its platform encrypted at 10:00 a.m. on a Tuesday. Run on screen, the clock's needle steps through the chain, and the link that breaks, send to the scheme, lights up with its suppliers, its gateway keys and its runbook.
- 04Six steps, four sources
Every recovery step timed from evidence
Scenario agentPayments stop routing at 18 m (the February gateway incident). The major incident is declared at 52 m (the same incident and the Brackmoor contract). The decision to fail over comes at 1 h 35 m (runbook RB-PAY-07 v6). Keys and certificates are exchanged at 3 h 25 m, and routing and screening re-pointed at 4 h 20 m, past the tolerance at 4 h. 41,000 in-flight payments are replayed at 6 h 10 m. Each step shows its evidence kind and a confidence from 0.89 to 0.95.
Why does the failover take so long? Three steps the May 14 test timed: keys and certificates exchanged by hand (1 h 50 m), routing and screening re-pointed (55 m), and 41,000 in-flight payments reconciled (1 h 50 m).
- 05One click
The evidence behind every minute
Imogen StrachanImogen opens the evidence. All six steps are matched to sources between 5 and 8 months old, under the 12-month limit, so none is an estimate. Beside them sits failover test FT-2026-05-14, run by Payments Platforms on May 14, 2026, with its timings and its lesson: a standby with pre-exchanged keys would remove the longest step. Tabs open the incident, the runbook and the contract.
Total from the decision to fail over to all traffic on the alternate gateway: 4 h 35 m.
- 06Oct 21, 4:31 p.m.
Harm counted from a real day
Impact agentThe Impact agent replayed the payments hub's volumes for Tuesday, October 13 through the 6 h 10 m disruption: 312,000 payments worth £48.6m delayed, for 268,400 customers, 4,870 of them with a support need. 38,200 were rent, bill or loan payments due that day. Its conclusion is that intolerable harm is likely, and a switch replays payday, Friday October 30, instead.
Counts only: no customer is named.
- 07Found Oct 16
A backup that shares a failure with the primary
Third-party agentThe Third-party agent read a supplier notice and found that the alternate gateway, Tolland Clearing, moved its hosting to Corrabeg Cloud, UK South, where Brackmoor already runs. Kwame Asante, the Third-Party Risk Manager, confirmed it the same afternoon. Corrabeg Cloud supports 6 important business services directly and 9 through the suppliers that host on it, and a test of that outage is proposed for Dec 2.
- 089:52 a.m.
The checker signs, and the fixes are already re-tested
Imogen StrachanCallum was the maker, so Imogen signs the result as the checker, and REM-2026-031 goes on the remediation plan. The Remediation agent had already proposed three options and re-run each on the same clock: A, a warm standby gateway off Corrabeg Cloud, 3 h 5 m, inside tolerance by 55 m, £1.9m one-off and £420k a year; B, a two-hour recovery commitment from Brackmoor, still outside by 45 m; C, a priority queue for time-critical payments as an interim. Imogen recommends option A to the SMF24.
The person who runs a test can never sign it.
- 0910:06 a.m.
The accountable executive accepts the fix
Diane Whitlow · Chief Operations Officer (SMF24)Only the SMF24 accepts a remediation item. Diane accepts option A by March 31, 2027, owned by Owen Pryce, Head of Payments Platforms, and funded from the 2027 resilience budget. Option C runs as the interim from Dec 15, 2026, and a live failover re-test is booked for March 2027.
- 10Same morning
The board document updates itself, with every line cited
Self-assessment agentSection 6 of the 2026 self-assessment, vulnerabilities and remediation, now lists REM-2026-031 with its owner, its date and Diane's acceptance, and all 10 sections are ready. The approval chain runs from Imogen to Diane, then the Board Risk Committee on Nov 19 and the board on Nov 26.