As a trader in other not to confuse yourself only following news that affect bitcoin directly as political news don't move bitcoin price.Brexit bill approver's news is a political news and most times politics don't affect bitcoin. Many people may sell off their pound but I doubt in their will invest it in bitcoin.
Only Fiat varies depending on the political and economic situation in the country. For bitcoin it means nothing. Bitcoin can only be affected by demand and manipulation on the exchange, which makes it possible to earn on the difference in price.