This deal is currently half price so £2.50 a month for six months due to a black friday offer. It does not show up on the Money Saving website but when you click to go to the Lebara website the discount is there. They have a cheaper plan for £3.99 a month currently on offer for £1.99.
Have you thought about heading back to Richardsons tomorrow you could pick up some extra blankets and ask them for some extra tuition. Plenty of shops in Stalham sell hot water bottles.
This is a good website it lists all the ISS passes and satellites https://james.darpinian.com/satellites/?fbclid=IwAR2qUz40fXYTB7820gLg5IU6dkt56x0su8gviIP5KEMpxL-gnl_XleDAt8s