Free water saving devices, varying from save a flush, water hippos, flow restrictors, tap inserts etc. List of participating companies with links in 1st post.
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[B]Anglican Water - [url=http://www.anglianwater.co.uk/environment/using-water-wisely/we-products/]Anglian Water | Home | Environment | Using water wisely | FREE installed Bits and Bobs[/url]
Bristol Water - [url=http://www.bristolwater.co.uk/savewater/]Bristol Water plc - Save Water[/url]
Cambridge Water - [url=http://www.cambridge-water.co.uk/customers/water-saving-products]Free Water Saving Products - Cambridge Water[/url]
Dee Valley Water - [url=http://www.deevalleywater.co.uk/form.php?id=j]Application for Save-a-Flush form[/url] (save a flush only)
Essex and Suffolk Water - [url=http://www.eswater.co.uk/your-home/saving-water/water-saving-kit.aspx]Essex & Suffolk Water - Water saving kit[/url]
Northumbrian Water - [url=http://www.nwl.co.uk/your-home/saving-water/water-saving-kit.aspx]Northumbrian Water - Water saving kit[/url]
Portsmouth Water - [URL]https://www.portsmouthwater-savewatersavemoney.co.uk/freepack[/URL]
Scottish Water - [url=http://www.scottishwater.co.uk/you-and-your-home/your-home/~/link.aspx?_id=82414884D783406EBF4B3A276F107B31&_z=z]Save-a-Flush - Scottish Water[/url] (Save a flush only)
Sembcorp Bournemouth Water - [url=http://www.sbw.savewater.co.uk/Shop/Free_Devices.html]Free Devices | Sembcorp Bournemouth Water[/url]
Severn Trent Water - [url=http://www.severntrent.savewater.co.uk/Shop/Free_Products.html]Free Products[/url]
South East Water - [URL]https://www.southeastwater.co.uk/pls/apex/f?p=101:256:0[/URL] (unspecified toilet)
South Staff Water - [url=http://www.south-staffs-water.co.uk/your_home/free_water_saving_devices.asp]Free water saving devices[/url]
South West Water - [url=http://www.southwestwater.co.uk/index.cfm?articleid=8012]South West Water - Free water-saving kit[/url]
Southern Water - [url=http://www.southernwater.co.uk/homeandleisure/waterefficiency/athome/saveaflush.asp]Flush Saver Bags[/url] (Save a flush only)
Sutton and East Surrey Water - [URL]https://www.suttonandeastsurreywater-savewatersavemoney.co.uk/freepack[/URL]
Thames Water - [url=http://www.waterwisely-savewatersavemoney.co.uk/]Choose Items | WaterWisely | Thames Water[/url]
United Utilities - [url=http://www.unitedutilities.com/free-water-saving-stuff-home.aspx]United Utilities | At home | My water supply | Save water, save money | Free stuff![/url]
Veolia Water - [URL]https://central.veoliawater.co.uk/water-saving-devices.aspx[/URL]
Wessex Water - [URL]https://www.wessexwatershop.co.uk/freepack[/URL]
yorkshire Water - [url=http://www.yorkshirewater.com/save-water-and-money/free-water-saving-pack-and-top-tips.aspx]Free water saving pack and top tips[/url][/B]
Forgot to mention as far as I can see no free devices / gadgets for Northern Ireland Water and Dwr Cymru Welsh Water. Sorry :)