Been looking at the dialogue and for the life of me I can't remember how to prevent an NPC from being bribed/ intimidated etc? Anyone know?

It's not possible to block bribing/intimidation from interface. The closest thing you can do is to have a custom line in "Bribe Success"/"Intimidate Success" topic with negative ModDisposition in the action box, something like "I'm taking your money and won't help you anyway, nyah nyah". But you have to keep in mind that bonus from bribing is random, so your penalty for must have be big enough to cover possible jackpots from high Speechcraft/Personality/Luck but at the same time reasonable enough to not be overkill to minimal bonuses.

Yeah thanks Kir I figured it out after playing about a bit. Been a long time meshing and not using dialogues lol how easy you forget after the age of 40+tax.....