It seems to me that until someone shows how both the bluestones and the sarsens COULD have been transported by Neolithic man to Stonehenge, then the only credible answer is glaciation.

Rollers and a decent seaworthy boat would suffice for the bluestones.

The sarsens remain a problem. At Durrington Wells Parker-Pearson has uncovered what he believes are the remains of the village used by the builders of Stonehenge, a total of 300 houses (huts). Not enough manpower to transport even the smallest of the sarsen uprights on rollers, in my humble opinion. Not even if they worked at it full time and stopped farming and hunting, (stopped eating).

Stone-rowing remains the only credible alternitive, a small workforce and very energy efficient.

Hopefully in the next couple of years I will prove that stone-rowing COULD provide a credible alternitive to glaciation. (I'm still working on it and things are looking promising)