← UK Grid · About · How it works
Run every 10 minutes on the VPS, results written to Supabase.
| Scraper | Status | Last run | Records / Duration | Error |
|---|---|---|---|---|
| UKPN | ✅ OK | 24 Sept, 12:20 (2m ago) | 82 / 5.4s | - |
| SSEN | ✅ OK | 24 Sept, 12:20 (2m ago) | 34 / 2.3s | - |
| Northern Powergrid | ✅ OK | 24 Sept, 12:20 (2m ago) | 24 / 22.2s | - |
| SPE | ✅ OK | 24 Sept, 12:21 (1m ago) | 54 / 40.8s | - |
| NGED | ✅ OK | 24 Sept, 12:21 (1m ago) | 76 / 9.6s | - |
| NIE | ✅ OK | 24 Sept, 12:21 (1m ago) | 17 / 0.9s | - |
| ENWL | ✅ OK | 24 Sept, 12:20 (2m ago) | 14 / 1.0s | - |
Fetched server-side and cached. CI, FUELINST and MID refresh every 5 minutes; FREQ every 60 seconds. Browsers receive data from this server, not the upstream APIs directly.
| Source | Status | Latest data | Detail | Cached |
|---|---|---|---|---|
| Carbon Intensity API | ✅ OK | 11:30–12:00 UK time | 81 gCO₂/kWh · actual · low | 4m ago |
| Elexon BMRS (FUELINST) | ✅ OK | 2026-09-24 period 25 | Published 12:15 UK time | 4m ago |
| Elexon BMRS (FREQ) | ✅ OK | 49.986 Hz | 5761 readings, latest 24 Sept, 01:00:00 UK time, about 11h behind real time. Settled data, not the live frequency on the main page. | 0m ago |
| Elexon BMRS (MID) | ✅ OK | 2026-09-24 period 25 | £144.57/MWh · 4,178 MWh traded | 4m ago |
On each server start, the most recent timestamp in grid_5min is compared to the boot time. If more than 10 minutes of data is missing, the gap is filled automatically from Elexon and the Carbon Intensity API before normal ingest resumes.
Checked at 24 Sept, 11:53. Latest data point was within 10 minutes of boot.
Failure alerts only fire when a scraper runs and reports a problem. This checks the opposite case: a scraper that has stopped running altogether and is reporting nothing at all. Thresholds are 45 minutes for the DNO scrapers and 30 minutes for Grid.
Last checked 4m ago. Nothing silent beyond its threshold.
This card covers the half that runs on this server, watching the VPS. The VPS separately watches the Grid scraper here, on its own 15-minute cron; that half cannot report through this page, because if this server were down the page would be down with it.
Checks how many rows exist at each resolution against the number expected for a full window. Both counts are taken against a window measured back from the current instant, so the actual can sit a row either side of the expected figure as periods open and close, and a count fractionally above it is normal rather than a surplus. Real gaps may appear if the server was down, an upstream API was unavailable, or the pruning window has shortened the history.
| Resolution | Window | Rows (actual / expected) | Coverage | |
|---|---|---|---|---|
| 5-minute | last 24 h | 286 / 287 | 100% | ✅ |
| Half-hourly | last 7 days | 336 / 335 | 100% | ✅ |
| Daily | last 30 days | 30 / 30 | 100% | ✅ |
Oldest daily row: 31 Dec 2019 Newest 5-min row: 24 Sept, 12:10
Counted on this server as requests arrive. No cookies, no third-party tracking, and nothing identifying a visitor is stored: each row is a daily total for one page, the bare hostname a visit was referred from, and whether it looked like a crawler. Crawlers are counted separately so they never inflate the human figures.
171
page views today, crawlers excluded · 298 more from crawlers
| Page | Views |
|---|---|
/ | 161 |
/how-it-works | 8 |
/about | 1 |
/status | 1 |
| Came from | Views |
|---|---|
| direct / no referrer | 170 |
1 view buffered, not yet written. Last written 0m ago. Counts are exact while the CDN stays off; if it is enabled, cached pages would undercount.