Thanks for your replies.
Since this post in November, I've had to abandon his crate as he used it to toilet in it. Since then, he's left to roam if I have to go out but only in living room and tiny portion of hallway. For the past 3 weeks, I've returned from school runs on a morning to no wees or poos so that is good, however, on the odd times I need to leave him for the afternoon school run, I sometimes come back to accidents.
Re. the screaming and barking when left. I had a good few weeks of good behaviour in January, however he has started it again whenever I go upstairs, which is frustrating. He really is mega obsessed with me, more so than my previous cocker, who was bad.
I suppose this behaviour is hindering his toilet training too, as at 6.5 months old, he should have grasped it by now but he continues to not perform very often outside. Just this morning, I've taken him out (he has waited at the living room door) 8 times in 2 hours and only 1 wee had happened outside, he trotted back inside and either had a wee/poo within a couple of minutes of coming back in. I am at a loss as to how to stop this so after my vet visit tomorrow (just to make sure nothing is wrong), I may consult a behaviourist.
Lesley