Reddit mentions of Sony MDREX50LPS SILVER EX Series Headphones

• Sennheiser CX300 | £34
  
  
  
• MEElectronics | £13
  
  
  
• Klipsch S3 | £30
  
  
• Sony Mid-Range | £15
  
  
• Veho Noise Isolating Earphones | £7
  
  
• Sennheiser CX175 | £25
  
  
• Philips | £22
  
  
• Sony | £18
  
  
• Philips (Virtual surround) | £21
  
  
• House of Marley People Get Ready Midnight | £25
  
  
• SoundMAGIC PL11 | £19
  
  
• Sennheiser MX 471 | £16
  
  
• AKG K311 | £15
  
  
  There's a few decent options. Hope that helps.
  
  EDIT: I added a few more to the list. Note: I don't own any of these. This is based off experience with companies and the amazon ratings.

These serve me very well.
http://www.amazon.co.uk/gp/product/B004RF9XM0/ref=wms_ohs_product?ie=UTF8&psc=1

Loads of answers already, but I've been using these for several years now - replacing like for like when I lose them. I'm still amazed at the quality of the sound, given their price.

Not the cheapest on here, but wanted to add another option

Sony EX50LP

I ride with these all the time

http://www.amazon.co.uk/Sony-Mid-Range-In-Ear-Headphones-Smartphone-Silver/dp/B004RF9XM0/ref=sr_1_1?ie=UTF8&qid=1416578270&sr=8-1&keywords=sony+in+ear+headphones

Just clip the cable on to your body so its got plenty of slack to move around. eg a zip closure, rucksack strap or similar.