Otherwise its a fiddly-faff and you must be able to move your dish to other satellites. Knowledge of dish positioning is a must; else you might get into a big heap of trouble (scratch a mark/draw an idellible line on the pole thing and dish bracket so you know where you started).
The first place to head is Astra 19°E (about 5mins clockwise) and then, later, Hotbird at 13°E. With a standard dish you'll get most of their offerings. When you get there, most will be (sic) foreign channels.
Finally, you will be limited to symbol rates of 27.5Mbaud and 22Mbaud - H or V and you'll have to input them manually (and tediously) into your digibox (ADD CHANNELS menu). When you are positioning the dish you should be watching for the signal in the SERVICES > SYSTEM > SIGNAL TEST menu.
Use the above site to check-out available frequencies.
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Your link lists various BBCi channels under astra 2b south...great link, thanks. Does this mean that even though the normal bbc channels are broadcast via astra 2d (and I'm unfortunately in the 3m dish plus footprint, but can't fit such a dish on my balcony...) these are on 2b sth, and so with my normal sky digibox I can pick them up with a little fiddling through the services menu ?