I love Bert's first album and there are lots of obvious guitar influences there.
On songs such as "Running From Home" and "Needle of Death", Bert employs his take on clawhammer style (as we used to call it) which, I imagine, he got from Archie Fisher.
Davy's influence is more to be felt on the instrumentals.
Talking about that first album, it is amazing how it really has stood the test of time, and even today I can still get a lot from it.