The Real Reason the US and UK will attack Syria
is not because Syria used chemical weapons, since the UK says that even if the UN team does not find evidence the Syrian government used chemical weapons they may attack anyway.
There is no reason why the Syrian government would use chemical weapons in any case, they have nothing to gain and everything to lose, since they are, with the help of Hizbollah, winning the war now. The people who have something to benefit are the Syrian rebels, who are losing, and who need intervention. If they can frame the Syrian government for a chemical weapons attack, they get what they need.
And that, almost certainly, is why the US and UK will attack, because their proxies, the FSA, are losing. If they don’t attack, Assad is going to win this civil war, not least because the rebels seem to have lost public support.