Reason for the Trident's offset nose gear?

Perhaps you folks on the other side of The Pond can clear this one up for me. What was the reasoning behind the offset nose gear on the Trident? I have seen the following reasons:

1. Location of the autoland equipment necessitated the offset nose gear.

2. Structural integrity- the offset nose gear retracting to one side could fit between two adjacent fuselage frames without cutouts.

3. A side-retracting nose gear didn’t intrude into the underfloor cargo hold as much as a longitudinally retracting gear would have.

4. The autoland equipment was so accurate that the offset nose gear prevented excessive tire wear from running over the runway centerline lights.

I think it’s a safe bet to say reason #4 is a load of dingo’s kidneys. I have always thought that reasons #2 and #3 were the case, but I see in many places reason #1 cited. From what I recall on cutaway drawings of the Trident, the radio equipment bay is above the nose landing gear well so I don’t see how that drove the design of the nose gear.