1) The bird shows very clearly that the dark crown extends to the bill base,breaking the supercilium - supposedly a feature for Long toed.
2) It also shows whitish fringed wing coverts contrasting somewhat with rufous edged scapulars - again apparently a feature for long toed.
3) The call, heard a number of times this morning was clearly a monosyllabic sound, which I rendered as 'prit' - not similar to other descriptions read.
4) In flight there appeared to be a hint of toes projecting beyond tail, although this was very difficult to be sure of - if present a feature for Long toed.
The bill is clearly solidly dark, including base of lower mandible - a LEAST feature. The shape did not remind me of Wood Sandpiper, rather a small furtive Temminck's Stint, and the tibiae did not seem particularly long.
On balance, I'm quite happy that the bird is indeed a Least Sandpiper, particularly on shape, leg length and bill colour. An absolutely superb find, and a truly fantastic bird. However, I thought it worthwhile raising these features so I can be educated, and just as a reminder that the features may not be as consistent as we would like, and the books might suggest!
Might have some better shots later when I learn how to use my camera - dashing out the door now into a lovely, wonderfully misty Galley Head!!!