Sussed.
You were not quite correct Mr. Rogers, it might have been that courvoisier, but you put me on the right lines.
" works for the text portion of a page, " get lost " prints:
"get lost"
But it doesnt seem to work inside html tags.
Looking at a ascii table I also found " which is html for " and it works but with the same restrictions as just mentioned.
However the arduino ide has a way of dealing with this, and its simple just \" , so Serial.println("\"GET LOST\""); would print -
"GET LOST"
My modified html progress bar now does indeed work.
Thanks.