Pruning fruit trees

We bought a patio Apple tree last year that produces two types of Apple's. When and how do I prune it?

We also bought a dwarf plum but last year it didn' fruit. How and when do I prune it and does it self pollnate?

 

The apple trees can be done now. The general rule of thumb would be any branches which are crossing over one another and any others which are diseased or dead.

Can't answer about the plum though.

 

Im sure plum like cherry is summer only pruning.silver leaf disease is arisk if pruned now.

Having said that im probably wrong especially as my 2 year old plum tree has only produced 3 plums so far :confused:

Btw if its a viccy plum its a self poly job

 

Can you post some photos, kazzawazza? If there's anything glaringly obvious, we can guide you. Otherwise A Guide to Pruning Fruit Trees - Chris Bowers & Sons might help. You get a reprieve until summer!
WeeTam is right about pollinisation....Victoria and it's offspring are self-fertile but most others need another plum tree nearby.
How to grow plums / RHS Gardening
Do your neighbours have any?