One is Labour leader, Jeremy Corbyn’s policy for the arts and culture (as Cardiff is a Labour administration with Labour currently in government at the Assembly as well):
The other is Arts Council of Wales’ advocacy toolkit which has infographics, short videos, details of how to talk to your AM, MP and councillor, and lots more:
http://www.artscouncilofwales.org.uk/what-we-do/advocacy-toolkit