Welcome to the forum
I cant comment on 'Brig' as a brand, but i can comment on 'Wolfrock'.
I recently bought a 'Ribeye 550/Yam 100' package from 'Wolfrock Boat Company' and can only reccommend them highly.
I owned a smaller Rib which i was using as a part exchange deal. I live in the same neck of the woods as you so therefore was 300ish miles from 'Wolfrock', but rest assured you are in good hands.
After i made the initial contact and declared my interest with 'Leon', a line of communication was opened. We spoke many times during the negotiation phase and i received lots of reassurance, help and advice from 'Wolfrock'.....not to mention some lads on Ribnet (you know who you are)
When i was happy with the deal on offer, i travelled south on the agreed date to conclude the deal. I spent the best part of the day with Leon and his team, including a sea trial and was looked after with copious amounts of coffee etc. I returned home later that evening with a smile on my face and a Ribeye on the towbar after a pleasant productive day with Wolfrock Boat Company.
I also launch from Caernarfon. If you need any more details, give me a shout