After double-checking from a couple of other sources, I have followed one of the suggested "Tweaks" I found on Google and it's improved the speed massively!
Here's what I did and I'll also include the relevant link for additional reading....
"...[1] type about
:config into the address bar at the top and wait for page to load
[2] in the filter type network.http
[3] locate the strand called network.http.pipelining and double click it to change the value from false to true
[4] Do the same to network.http.proxy.pipelining
[5] Then locate network.http.pipelining.maxrequests - double click and change the value to 30 or higher (I'm using 40)
[6] Finally, close flock and load it up again..."
Did that and its working like a dream
Here's some additional reading plus some further discussion on speed related issues....
Flock Browser - Speeding Flock up | Flock
And guys who posted on the thread, many thanks for offering your suggestions and experiences with Flock.