How to Pronounce the T Sound Correctly

We've gone to a party in Clarity Square and that's in Islington. We're still going out. It's been half an hour now. Mullard him on the bus. It's all gone pay a shake right? He said he's all gone pear shaped which is another kind of typical sort of cockney expression. If something goes pear shaped it means it goes all wrong. Everything goes wrong. It's like a disaster. So we've gone up there to a lovely three tier townhouse in Islington, London. Very nice. I've got three kind of tear houses, tear houses.