Anglian Water Business (National) Limited (trading as Wave). 50/50 joint venture between Anglian Water Group and Northumbrian Water Group, held through Wave Ltd.
England & ScotlandAt a glance
National business water retailer serving 300,000+ organisations across England and Scotland, jointly owned by Anglian Water Group and Northumbrian Water Group.
Last reviewed 10 June 2026. Facts are drawn from Wave's own published pages, Companies House and the MOSL dashboard snapshot (March 2026). Verify anything you intend to rely on against the current source.
Taken from the retailer's own published service pages.
When a site takes supply without a negotiated contract, for example after moving in or letting an agreement lapse, the retailer bills on its published deemed or out-of-contract terms, which differ by wholesale region and are updated each charging year. We never republish the figures: they change annually, so the only reliable source is the current document.
Wave publishes its deemed and out-of-contract terms in its own charges documents, linked below. Check the document for your wholesaler region and charging year before comparing it against a negotiated offer.
Wave is one of the largest business water retailers in Great Britain. It was formed when Anglian Water Business and NWG Business combined their non-household retail operations around the opening of the English water market in April 2017. The Competition and Markets Authority cleared the 50/50 joint venture unconditionally on 2 August 2017, and the combined business launched with around 300,000 customers, turnover in excess of £500m and roughly 19% of the market. Wave remains jointly owned by Anglian Water Group and Northumbrian Water Group through the holding company Wave Ltd, although the owners were reported by Sky News in July 2023 to be exploring a sale.
The licensed retail company behind the Wave brand is Anglian Water Business (National) Limited, Companies House number 03017251, registered at Northumbria House, Abbey Road, Pity Me, Durham. The second licensed entity inherited from the merger, NWG Business Limited, was renamed Wave Utilities Limited on 30 April 2024 and now files dormant accounts, leaving Anglian Water Business (National) Limited as the trading retailer named in Wave's website footer and deemed contract documents. For the year ended 31 March 2025 the business reported revenue of £554.9m and pre-tax profit of £8.6m.
Wave supplies water and wastewater retail services to non-household customers across England and Scotland, from single-site SMEs to large industrial, commercial and public sector portfolios. Its published services include consolidated multi-site billing, dedicated account management, smart metering with automatic daily reads, leak find and fix, in-house trade effluent support and water efficiency audits, alongside a 24/7 online portal called My Account. Customers who receive services without signed terms are placed on a deemed contract, with regional business rates documents and separate Scottish default terms published on its website.
Frequently asked
Wave is jointly owned by Anglian Water Group and Northumbrian Water Group through Wave Ltd, a 50/50 joint venture formed for the opening of the English business water market in April 2017. The licensed retail company that bills customers, Anglian Water Business (National) Limited, is a wholly owned trading subsidiary of Wave Ltd. The Competition and Markets Authority cleared the joint venture unconditionally on 2 August 2017.
Wave places any customer receiving services without signed terms on a deemed contract, with the applicable charges published on its terms and pricing page, which we link to from this page. Rates differ by wholesale region (Northumbrian Water, Anglian Water and Essex & Suffolk Water areas each have their own business rates documents) and are updated when wholesale charges change, typically from 1 April each year. Separate default terms and charges apply to premises in Scotland. Check Wave's published rates documents for the figures that apply to your site.
Yes, if your premises are in England or Scotland and you are a non-household customer. Wave retails water and wastewater services to businesses, charities and public sector organisations across both countries, a footprint it has held since the joint venture launched around the April 2017 English market opening. Physical supply always remains with your regional wholesaler; Wave handles billing, meter reads, account management and value-added services such as leak detection.
You can call Wave on 0333 207 9283, Monday to Friday, 09:00 to 17:00. The company also offers live chat on its website, an online portal called My Account for bills, meter reads, payments and account changes, and a postal address at Wave, PO Box 745, Huntingdon, PE29 9PW. Email addresses for general, broker (TPI) and media enquiries are listed on the contact page at wave-utilities.co.uk.
Yes. Wave offers consolidated billing across all locations, dedicated account managers for large industrial, commercial and public sector customers, and consumption data analysis to highlight problem sites. Its large business service page also lists leak find and fix, in-house trade effluent support and tailored water efficiency services. With over 300,000 business customers and roughly 19% market share at its formation, it is one of the largest national retailers handling multi-site portfolios.
Customers would be transferred automatically to another retailer under Ofwat's interim supply arrangements, with no interruption to water or wastewater services, which are always delivered by the regional wholesaler. Wave's owners, Anglian Water Group and Northumbrian Water Group, were reported by Sky News in July 2023 to be exploring a sale of the joint venture, but no sale has been announced, and a change of owner would not alter customers' protections under the market codes.
Lucy Darch is Wave's Chief Executive Officer, confirmed in interviews with Water Magazine in August 2024 and Business Focus Magazine in October 2025. Wave's own press pages also record her appointment to the water industry's Strategic Panel and to the board of MOSL, the market operator for the English business water market. The business is run from Durham, where the licensed retail company is registered at Northumbria House, Pity Me.
Wave serves over 300,000 business customers across England and Scotland and reported revenue of £554.9m with pre-tax profit of £8.6m for the year ended 31 March 2025, according to Insider Media. At its formation in 2017 the joint venture held approximately 19% of the market. A post on Wave's own website in November 2025 describes a 300-strong team.
We are an independent broker, not the retailer. When you tender through us, Wave is quoted against the whole licensed Open Water retailer panel, with the wholesale charge, retailer margin and our margin shown separately on every offer. No retailer pays for placement on this page and this profile is not a ranking. Our guide to how to compare business water suppliers covers the criteria we score offers on, and our step-by-step guide to switching business water supplier walks through the CMOS process, with no interruption to supply.
Send us a recent bill per site. We tender the licensed Open Water retailer panel and come back with the best fit, with the wholesale charge, retailer margin and our margin shown separately on every quote. Or call us on 0161 521 3400.
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