POSTCODE DISTRICT · NORTHERN IRELAND

Derry / Londonderry BT48 postcode area

Read the preparedness conclusion for BT48 in Derry / Londonderry, check which council figures apply and find the official warning service for this location.

DISTRICT REPORT SCOPE

Area evidence, not a full-postcode grade

The BT48 prefix covers multiple addresses and may cross council or warning-area boundaries. The 0–6 Data & Preparedness Score below counts documented sources for this district. It is separate from the conditional A–G disruption grade on a full-postcode report.

A–G grade for BT48: not assessed at district level. A complete postcode is needed to check live utility and road incidents and listed emergency-care distance. A grade appears only when all three inputs can be scored. How the full-postcode grade works.

Population density compared with the UK

UK average: 287 residents/km². Figures below cover the named councils.

Derry City and Strabane123 residents/km²UK council density percentile: 13/100

ONS mid-2025 population estimates · MYE5

Preparedness conclusion for BT48

Use Northern Ireland flooding information for the address you are checking.

Derry City and Strabane is 164 residents/km² below the UK average of 287 residents/km².

BT48 uses the wider Derry City and Strabane council geography for the density comparison. That average brings together places beyond the city and cannot establish the conditions at a specific address. The English Environment Agency feed supplies no warning count here.

Find Northern Ireland flooding information

Local flood evidence for BT48

Recorded flooding

The Department for Infrastructure's North Western flood plan records intense rainfall on 17 August 2004 that overwhelmed drainage in Derry city centre, including Strand Road. Strand Road has BT48 addresses; the record does not show that all BT48 properties flooded.

DfI North Western Flood Risk Management Plan, Derry history

Official flood source and coverage limit

Northern Ireland's Department for Infrastructure publishes Flood Maps (NI) for planning and recorded flood extents. This is not a live BT48 flood-warning area, and no local-warning point is awarded.

DfI Flood Maps NI contents and scope

Data & Preparedness Score 5/6

Several useful sources are available. Check the gaps below. The score describes the evidence available in this report. It does not measure risk, safety or personal readiness.

Warning coverage 1/2: An official service is linked. A named local warning or alert area has not been verified for this page.
Official guidance 2/2: Local authority or regional preparedness guidance is linked below.
Data completeness 2/2: Council density is available. A local flood record is documented.

How the district score is calculated

Warning coverage earns 2 points for a documented local warning area, 1 for an official service link and 0 when no source can be identified. Guidance earns 2 for a local authority or regional preparedness link, 1 for UK guidance and 0 when neither is available.

Data completeness earns 2 points when council density and a documented local flood record are both available, 1 for either and 0 for neither. The three scores are added. The number or severity of current warnings does not change the score.

Emergency information for BT48

Keep the full address and relevant household contacts accessible if services are disrupted. Use nidirect for Northern Ireland reporting routes and follow official local instructions for the affected place.

Derry City and Strabane District Council publishes weather-warning advice and local reporting routes. The district includes Derry streets with different river, surface-water and road conditions; use the exact incident location.

Check a full BT48 postcode

Enter the complete postcode, including its final three characters, to see the nine-indicator evidence breakdown, any supported provisional A–G grade, local incident results and a check against official flood-warning boundaries.

How the nine indicators apply

A district prefix covers many full postcodes. This page has no live A–G disruption grade and does not assess war or nuclear risk. Enter a complete postcode above to see the nine-indicator breakdown for its returned location.

Can contribute to a full-postcode grade: Infrastructure: matched electricity or water incidents where covered. Medical resources: straight-line distance to a listed emergency department. Road access: nearby active TfL events where covered. Missing feeds are excluded, not scored as zero.
Can be shown, without a risk score: Wind direction and speed, one-hour rainfall forecast, and elevation with sampled local relief. These do not establish exposure to a particular incident or protection at a building.
No verified postcode-level assessment: Military targeting, building structure and designated shelter availability. A postcode prefix cannot supply these details.

Full scoring method · Compare full postcodes · UK Emergency Alerts