Thomas Dudley Long Lever Concealed Toilet Cistern with internals see pictures
Hudson Reed - Dual Flush Concealed WC Cistern with Wall Hung Frame - XTY015
Universal Plastic Concealed Toilet Cistern with L Bend and Dual Flush Button
Back to Wall Compact Concealed Cistern Universal in-Wall Concealed Toilet Cistern Dual Flush 3/6 Litre with Chrome Cable Push Button BTW Water Saving Cistern
Balterley Wall Hung Toilet with Concealed Cistern, Square Soft Close Toilet Seat, Rimless Pan, Toilets for Bathrooms, Concealed Cistern with Square Push Button Plate - 363 x 486 x 364mm (White)
Balterley Concealed Cistern with Dual Flush, Water Saving Side Inlet Concealed Toilet Cistern & Round Flush Plate for Back to Wall & Wall Hung Toilets - 340x142x296mm (Chrome/White)