Cut me off when two lanes were zip merging (merging in turn), to the point we were both in one lane, i had to slam on the brakes before i hit a small fence. driver behind let me in. the driver of BT21 ZRA then decided to brake check me. As our lane then joined the dual carriageway (A725) The driver pulled straight across double white lines, when i came over to pass a bus i was then brake checked twice more, with the driver pulling off 1 exit later sticking the middle finger up out the window.