Thanks Watermom. Results as follows:

K2006C Test Kit

Chlorine
10ml Sample - 2 doses R0870 resulted in no color change = no Free Chlorine
5 drops R0003 gave a very slight pink color.
1 drop R0871 cleared the water = 0.5ppm Combined Chlorine

pH
5 drops R0004 in 44ml turned the water yellow = pH below 7.0
10 drops R0006 = pH 7.0
12 drops = pH 7.2
14 drops = pH 7.4
15 drops = pH 7.6
17 drops = pH 7.8
18 drops = pH 8.0

Total Alkalinity
1 drop R0009 turned the solution red = 10ppm Total Alkalinity

Calcium Hardness
7 drops R0012 turned the solution blue = 70ppm Calcium Carbonate

Cyanuric Acid
The dot never disappeared = less than 30ppm Cyanuric Acid

Samples taken from the deep end by the skimmers, at arm's depth.

Pool was shocked Tuesday evening - I guess this isn't a good set of results?! Any advice on next steps much appreciated!

Thanks in advance,
Mark