I don't think there's a cycle lane there (unless you count the cycle gap) at the Old Oak Road end - it looks to me as though they're trying to cut off use as a ratrun to Old Oak Road, while preserving the cut through in the other direction, and retaining both two-way property access and allowing cyclists to continue to pass through.
It all feels a lot more complex than more conventional LTN infrastructure though - I don't see what's wrong with a No Entry (well, No Exit I suppose ...) sign at the other end, possibly camera enforced, and a cycle bypass.