There are two parts to your question.
1. Your house was built, circa 1900, then the binder will most certainly be lime mortar.
2. If the greater percentage of the bricks look as if these do not need repointing i.e. the mortar is flush with the edge of the bricks, just patch point to match, the new lime mortar will soon weather to match the existing.
Coincidently, I am coming to the Peak District, from Norwich next weekend for a couple of days walking and would be happy to drop in and advise you accordingly.