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Greater London Historic Environment Record (GLHER)

The GLHER is a major resource for the understanding of the historic environment of Greater London. This page provides a summary of what the Greater London Historic Environment is, what data we hold, how to access our data, and our charges.

Person holding pots found at a Romano-British roadside settlement
Finds from a Romano-British roadside settlement, Watling Street, Bexley

What is the Greater London Historic Environment Record?

The GLHER is a comprehensive and dynamic resource for the historic environment of Greater London. From the earliest human occupation to the present day, its data supports the work of the Greater London Archaeological Advisory Service. Our computerised record contains over 87,000 entries providing data on archaeological sites, historic buildings, historic parks and landscapes, finds and heritage features, and supporting sources of information.

Find out more about what data we hold.

How do I access the Greater London Historic Environment Record?

The GLHER is a public record, and we welcome enquires from anyone interested in the historic environment of Greater London.

Access to GLHER data takes two forms:

  • Remote searches that involve the supply of digital GLHER data.
  • HER visits, which involve a personal visit to the GLHER office.

Remote Searches

The GLHER aims to respond to all searches within seven working days. Where information is required sooner, for commercial enquiries, a Priority search can be requested with a response within two working days, although this will be charged at an additional cost.

For commercial searches a quote will be provided. This must be accepted, and our data licence signed before work can proceed.

All our data is supplied under a 12-month data licence, with users entitled to a 6-month data update on request.

HER Visits

You can consult the GLHER in person, 10am-4.30pm, Monday to Friday, at our office in Cannon Bridge House, 25 Dowgate Hill, above Cannon Street railway station. Space is limited, so please give as much notice as possible when making an appointment to visit.

The GLHER Online

An abridged version of the GLHER database is also available online at the Heritage Gateway along with over 50 other HERs across England, as well as the National Monuments Record Excavation Index, details of Scheduled Monuments, Listed Buildings and Registered Parks and Gardens.

The GLHER database is also available via the Archaeological Data Service: Archsearch webpages.

Please note, that we only update this twice a year, so information may not be current. For up-to-date information, contact the GLHER team.

Is there a charge for Greater London Historic Environment Record data?

Charges are made for licensing the commercial, for profit, re-use of HER information. Enquiries from the general public, and academic researchers are not charged, although the GLHER reserves the right to charge for research projects that request large amounts of HER data.

Non-priority search

All non-priority searches will be dealt with within seven working days.

Standard Search (up to 100 HER Monument Records) - £55
Extended Search (up to 200 HER Monument Records) - £80
Large Search (201 HER Monument Records +) - Individually priced

Priority search

Dealt with within 48 hours (working week only).

For Standard and Extended searches (up to 200 HER Monument Records) - £65 plus the Standard or Extended search charge. (i.e. Standard £120, Extended £145).

Large scale searches, over 201 Monument Records, may be processed as Priority searches, but this will be on a case by case basis dependent on the nature of the search request and GLHER resources available.

All charges are shown exclusive of VAT.

Following a data request an invoice will be sent out to the HER user by Historic England at the end of the month. Payments should be made within 30 days, and access to Historic England (chargeable) services may be suspended if payment is not made within this time.

What radius do I need for my search area?

It is essential to obtain an up to date search on archaeological discoveries and activity for the site and its surroundings from the GLHER, and a licence for data use. It is the responsibility of the organisation undertaking a desk-based assessment to ensure that the search area is appropriate to the location and nature of the development.

Generally we would expect search areas in Inner London to extend 250m - 500m from the site and in Outer London 500m - 1000m. Discussion with the GLAAS case officer or GLHER can help ensure an appropriate search is run. Overly narrow search areas or arbitrary limits on the number of records returned should be avoided.

A search on other data bases, such as the Heritage Gateway, is not an acceptable substitute for a GLHER search and may constitute breach of copyright. The Heritage Gateway and the Archaeological Data Service: Archsearch however, may be used as a guide to what may be within your area of interest, and the likely cost for a data licence.

Find out more about the GLHER Access and Charging Policy.

What is the Greater London Historic Environment Record currently working on?

We are working on a number of projects, some of which our volunteers are carrying out for us. Current projects include:

  • Adding Locally Listed Buildings to our GLHER database,
  • Enhancing our parks and gardens records,
  • London workhouses,
  • First World War hospitals, and
  • Revising our Archaeological Priority Areas.

Volunteering with the Greater London Historic Environment Record

We have a number of opportunities for members of the public, or students to volunteer with the Historic Environment Record team. We provide full training and support so you don't need any previous experience, and you will play a critical role in helping to conserve London's historic environment.

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