HI parsec - thanks for taking the time to reply. Your readings are pretty much what I would have expected after a few weeks. As it stands my E1 value is multiples beyond yours after a few days.
The PC was bought a few days ago from a reputable supplier and has been barely used other than to install the sorfware. The hardware / software spec is as follows:
Intel® Core™i7 Quad Core Processor i7-4770
ASUS® Z87-A: ATX MOTHERBOARD
16GB KINGSTON DUAL-DDR3 1600MHz
1GB NVIDIA GEFORCE GT 640
120GB INTEL® 530 SERIES SSD, SATA 6 Gb/s
2TB WD CAVIAR BLACK WD2002FAEX
2TB WD CAVIAR GREEN WD20EZRX
Software on SSD:
Windows 8.1 64 Bit
MS Office 2010
Adobe Photoshop Elements 12
Serif PagePlus x7
Thunderbird (+ 8Gb of emails)
The PC will not be used for gaming or videos but will be used for intensive office multi-tasking and occasional photo editing in the future (but hasn't been so far). All downloads and data (other than the Thunderbird email profile) will be stored on one of the hard drives. The SSD firmware was updated before I looked at these results on Toolbox (Version 3.2.0). The SSD has 57Gb of free space. As you say the wear indicators are OK so probably incorrect readings.