The only tools you need are metric sockets and spanners, Allen keys and Torx bits. This one was from Amazon:
The seat is held on by three Torx bolts, and the tank by two metric bolts
I removed the seat, and rethreaded the bolts into it for safekeeping, Makes it much easier when it's due to go back on:
Prop the rear of the tank up with a handy piece of wood:
You can see the black connector for the fuel line. Now removing this is tricky, but not that hard. There's a great thread here: https://www.triumphbobberforum.com/f...oved-tank.html
You have to pull the connector cover back, press the two side buttons simultaneously, and pull the connector off. The tricky bit is that the pipe the connector is fitted onto is quite long, and you have to pull STRAIGHT up: any sideways force will be resisted and you'll think the connector wont come off. It does require a good push to start, and my top tip is that when you notice that the sliding cover won't slide back into place, you have successfully dislodged the connector and it's ready for the Long Pull. The two white connectors in the background are for the fuel sensor and pump, and these come off easily once you realize that the black connectors are fitted into the white ones.
This shows them disconnected, and also note the painter's tape around the fuel pipe to prevent dust getting in, and to help me find it next time. On the other (left) side of the tank there is a breather pipe that is just push-fit to the tank. I also sealed that with painter's tape to remind me to reattach it when the tank goes back on: