John Lewis has this Sennheiser RS120 wireless RF headphone system on sale for £59.95
Use offer code "1234564motherandb" to lower the price to £39.95. Delivery is £3.95 extra. Go through Quidco for 4% cashback (~ £1.75).
The RS120 is an open, wireless RF headphone system. Its transparent and well-balanced sound with great bass response makes this system an ideal choice for all types of music and TV applications. Furthermore, its innovative 'easy recharge' function offers the ultimate in convenience when it comes to charging and storing your wireless headphones. Enjoy total freedom of sound, stylish design and maximum comfort. Range: 100m.