Yeah, they said 150 was their usual fee, but that we could make a donation of any size. Since my will will be extremely minimalist (no property, really, other than household goods, and my bank account here in the UK) there shouldn't be much work involved. The Daughter is already named beneficiary on all my other accounts. So I'll probably donate 100 since it's going to charity.
They also can't do the notary thing. Still waiting to hear from the JP Court.