How to siphon fuel from a RX300 (2004)?

[Fsport]

Further to my gearbox thread, I have just bought a Gen 4 RX450H F sport to replace the RX300.

What a huge difference.  Lovely car.

However, just before the gearbox went on my RX300, I filled the car up at the petrol station.   It is now holding a full tank of petrol.

What is the best way to siphon the fuel out before the scrap man comes and picks up the car next week.

Tried the old tube into the refill hole but it doesn't go all the way into the petrol tank.  I assume there is a security feature.  Is the only way via the back seats and after removal of the petrol pump?  Seems a bit of a faff if so.  Are there any other ways  to get the petrol out?