Well, first of all - those events are hardly significant to move the currency markets. There's a reason why those events are colored yellow/orange. The 'red' ones are important - but not all of them either. The GBP/USD can easily move 300-400 pips when a significant report has been released. Remember, it's all about market 'expectations' rather than the actual news. If the markets are expecting a -5% growth rate, and that report comes out at -5.1% - GBP won't move much - maybe by 10-20 pips at the most.
Since the last 2 years the forex market has been very temperamental - sometimes they rely on equities, sometimes they don't. When global stocks fall - the US$ rallies and so on.
Now look at the Non Farm Payroll report which occurred on Friday. I've seen this pattern a few times before - it was a bad report.. and the US$ actually went up (short term) *gasp* Why is this? Short term, traders anticipate that this bad news will cause the stock market to collapse - so there's a flight to US dollars - this is only short term though. Additionally, the increase in unemployment caused the US interest rate futures to shoot up (increased possibility of a rate hike)
An hour later however, you'll see that the USD started dropping (like it should have in the first place) and EUR/GBP climbing up. I always stay out of the NFP for the first 15 minutes or so - to gauge the market direction. Especially in the current economic environment.
3-4 years ago, it was very simple. Bad job reports? USD sank for an hour non-stop - easy trades. Not so anymore.
Check out the Bank of England's inflation report today (King is going to give a speech) Depending on what he says, GBP has the potential to move hundreds of pips. Good luck!
) your advice would be to just concentrate solely on big (red) announcements and pay attention to their movements?