Many frequent flyers stand by the fact that if you keep yourself hydrated and get plenty of rest the effects of jet lag should go within a few days. However, there are some other ways to stop Jet Lags effects and there are remedies to stop you getting it all together.
London to Barcelona jet lag stats
Lets assume you left London at 9:00am. The flight takes approximately 2 hours 10 minutes so you would arrive in Barcelona at 11:11am London time which is in fact 12:11pm Barcelona time.
Your body will be telling you that its 11:11am but actually its now 12:11pm