Well were finally making some progress with Mogwai & Willow, they were both majorly put out when I adopted 2 new kittens, & refused to be anywhere near them at first.
Kittens are now 14 weeks old & although Mogwai & Willow are still a bit humpy, about them, all 4 cats can actually be in the same room together, with no hissing or spitting!
The kittens are desperate to make friends lol both run up to the older 2 & try to rub up against them purring loudly, which usually results in the older too getting up high out of the way.
Hopefully by the time the really bad weathers here & the older 2 are in doors most of the time they'll all be snuggling up together ( I can live in hope

)