With the tip off for Gael (the Irish lady), when Faith got in the car with the bad detective, she sent a text saying "ok", then the phone rang so I assumed that was her tipping her off to ring.
Steve and the £120k, I assumed he took the drugs and sold them to get the money then tried to double cross. Or, when they referred to £120k did he mean the drugs were in the bag as £120k worth. He was meant to sell them for Gael to get Faith off the hook so I assume he must have had them.