The letting agent is asking for copies of the photos I took inside the house - should I send them?
If they do not refund you then you can issue proceedings in the County Court. You can either do this online at: www.moneyclaim.gov.uk or by completing form N1 http://hmctsformfinder.justice.gov.uk/courtfinder/forms/n001-eng.pdf and take it to your local County Court.
In response to your advice 'take to my local county court' - I live in Sunderland but the property is in Cardiff, Wales. Do I take it to Sunderland Court or does it have to go to Cardiff Court?
Yes I would set out the issues for the avoidance of any doubt.
Does this clarify matters for you?