Fees have not yet been announced. The fee for North America was £3550. We are expecting a ’not more than’ fee to be published later this year, and no absolute commitment (only a good intention) is required from you before this figure is confirmed.
Money shouldn’t be a barrier to anyone wanting to apply. If this is a concern, have a chat with the unit leaders who should be able to help you identify funding sources. Some of Warwickshire’s participants for the 24th World Scout Jamboree managed to fundraise the entire £3550!