I would suggest that outside of London the salaries are massively different. Though £15k is still almost-criminally low regardless of where you are.

I'd expect someone with 3 years web dev experience to be anywhere from mid-20's to mid-30's outside of London, and a cursory search for Suffolk that appears to be about right.

Hi, I saw some rates in Lodon for my experience(around £60k for >6 years for permanent positions). Are these rates before or after taxes ? I'm asking because it varies from country to country. Thanks Andrei