Hi Peter and Lee
Sorry for delay in getting back to you .
Actions to date.
reloaded latest update via sd card, no wifi, installed new wifi dongle still no wifi, tried another wifi dongle no change.
Formatted new 8gb sd card, installed previous working update, no change no wifi, gps is flashing green.
Looking at end of PilotAware case can see, bottom left solid red led, on the board above are flashing red and flashing green led's , still no wifi.
Changed the Raspberry Pi circuit board for a known good one, new wifi dongle ,new sd card original gps dongle .
As viewed via the hdmi connection the software was installed then the rainbow screen then the long list of actions terminating with
Raspbian GNU/Linux 9 paw tty1
paw login: ( flashing cursor)
I am out of options now, nothing to change except the pc board plugged in on top of the Raspberry Pi board are these available?
Thanks Brian