In October 2025, we delivered critical stability and performance improvements across two repos: alphagov/govuk-helm-charts and alphagov/frontend. The work focused on preventing production outages by stabilizing frontend pod resource allocation and on accelerating CSV previews while improving robustness for edge-case inputs. These changes reduce production risk, improve user experience for large or problematic CSV files, and demonstrate effective cross-repo collaboration and end-to-end ownership.

September 2025 monthly summary: Delivered performance, reliability, and cost-efficiency improvements across the GOV.UK Fastly and developer documentation workstreams. Key features delivered include weekend DDoS protection monitoring mode to observe traffic with blocking disabled, and CDN cache optimization for the /prepare path by stripping query parameters to improve cacheability and response times. Major bug/maintenance work included restoring blocking mode for assets services across integration, staging, and production environments to maintain security posture, and a suite of VCL cleanup and minor configuration improvements to simplify maintenance, standardize comments, remove redundancy, and update the mirror crawler user agent. Documentation updated to reflect a switch from Let's Encrypt to GlobalSign for TLS certificates to reduce costs. Overall, the month delivered tangible business value through improved cache efficiency, operational risk reduction, and cost optimization, while strengthening maintainability and security controls. Technologies demonstrated include Fastly VCL, cache strategy, configuration management, monitoring, and multi-repo collaboration.

In August 2025, delivered a targeted API payload optimization in alphagov/frontend by pruning historic bank holiday data and simplifying the Bank Holidays UI. This reduces data transfer and processing load for consumers, with the Bank Holidays page now reflecting only current and future dates. No critical bugs fixed this month; the focus was on performance and data minimization to improve downstream performance.

July 2025 performance summary for alphagov repositories focused on hardening edge security and improving incident visibility. Key features were rolled out across the GOV.UK Fastly footprint, with a staged approach to minimize risk while expanding protection and observability.

May 2025 monthly summary for alphagov/govuk-infrastructure: Implemented security and reliability improvements to the public-facing WAF and rate-limiting configuration. Upgraded the WAF Terraform module to v0.0.20, resolved a versioning typo, and clarified rate-limiter metrics by renaming cache_public_post_rate_warning to cache_public_post_rate_limit with a refreshed description. These changes strengthen protection against common web attacks, reduce configuration ambiguity, and prepare the groundwork for smoother upgrade cycles.

April 2025 monthly summary: Deliverables across two repositories focused on security infrastructure improvements and governance cleanup, with traceable commits and clear business value.

In 2024-11, the team delivered a targeted cleanup for alphagov/frontend by removing the legacy 2021-election-specific "Register to Vote" feature. This included deleting the presenter class, YAML configuration, and related tests, aligning the frontend with current requirements and reducing maintenance surface. The change is captured in commit a1b0984e23880eb6d15845305f9a1f9400400785 with message "Remove stale Register to Vote config".