Bird Song ID

If it's any help, the Merlin Bird ID smartphone app has a useful Sound ID function. It got song thrush for your main offender, which I can believe once tuned in to the repetitions. It also flagged nuthatch near the beginning, which I'm less sure about -- sounded like a ticking robin to me, but I'm sure others can judge better than me.

Funny time of year for thrush song -- is it a recent recording? And bear in mind that bird ID suggestions from this app are geographically selected, though shouldn't make too much difference unless you're in Timbuktu?

Sounds like a Parakeet to me.

Ring-Necked Parakeet seem to be building up colonies throughout the uk mainly to the detriment of other species.