Thank you I jumped in at the deep end and brought a p4 even though I have flown it I'm not sure do I need to use internet or my iPads Data I always have it on but do you need a source of internet etc to fly a DJI phantom 4 any knowledge would be greatfully appreciated thanks in advance

No ... you don't need any internet data at all to fly your Phantom.
Many owners use wifi only tablets with no problem at all.

You can use the device without network. You may need to cache the map in advance.