To update on this, finally flashed the panel and can't thank secureiam enough for the assistance with this. Turns out that the flasher unit I purchased again from a well know auction site was not an official Texecom unit and as soon as I connected the genuine unit (courtesy of secureiam) it worked first time. I now just need to connect all of the other parts and hopefully I'll have a fully function alarm system again. Also many thanks to others that have contributed to this too.