Think I've almost cracked it. There are only a few bits that I'm unsure about now so I've substituted a workable phrase.....so here's my best guess.......

HOLMES AND WATSON
As recorded by Mick Ryan and Peter Harris on "The Long Road" (2001)

1. Back in the eighteen-nineties in London's Baker Street,
There lived a great detective who never could be beat.
He had a most phenomenal brain, and criminals lived in dread
At the stunning bolts of intellect which flashed inside his head.

CHORUS: "Oh, how do you do it, Holmes?" "Elementary, my dear Watson.
I knock spots off the criminal mind, providing it's got spots on.
Crimes that trouble lesser men and leave ‘em all at sea
To my deductive intellect are elementary."

2. One winter's night in Baker Street, sitting by the fire,
Watson did the crossword and of Holmes he did inquire:
"One across is hard," he said; "the name as a French resort."
" A la Monterrey dear chap," was the master’s quick retort.

3. The great man's friend was much impressed and gave another clue:
"This one's a stinker," Watson said; "Let's see what you can do.
'Must be digestions waterway' that makes no sense to me."
"The answer's simple, Watson; it is 'alimentary.' "(canal!)

4. While Watson stayed at Baskerville, Holmes was in disguise,
But revealed himself upon the moor to Watson's great surprise.
"The hound's abroad," the great man said above the wind and storm.
It sates its lust for flesh upon the beach at Benidorm

5. On the trail of Moriarty, Watson one day found
Holmes just like an Indian scout lying on the ground.
"He's heading for the continent by the road to Dover.
I know this to be true because his carriage run me over."

6. With Moriarty cornered at the Reichenbacher Falls,
At last the great detective had him by the short & curlies.
Moriarty dragged his rival into the abyss,
But Holmes he made a comeback; it was a piece of cake.