Choosing which scientist will replace Her Majesty's face is to an extent being left up to you: Yonder link Think science for the new £50 note | Bank of England Anyone who can pass a recaptcha test can nominate. I consider Isaac Newton the obviously correct choice but readers may not Note - Boaty McBoatface is a robotic marine exploration vehicle, not a deceased scientist.
Meh.... Their money. Their choice. We have far too many smarmy Brit ex-pats on out TV preaching at us for me to be tempted to critique their bank notes. As pleased as I am about the fact that they're not using Euros, perhaps the Brits ought to adopt the practice of putting fictitious junk on their money to avoid future 'nontroversies.' After all......Ike was a....(*gasp!*) theologian. Religious folk on MONEY? tisk....tisk.....
No need to critique; one either wishes to be involved in selection process, or not. Sir Isaac was many things other than scientist. Waited table in College. Anit-counterfeiter for Bank of England (their direct tie in). Alchemist who may have died of chronic mercury (Hg) playing. Last idea might actually be tested by exhumation.
It is a circumstantial case at present. He got a bit kooky in last of his 80 years, but hey, who doesn't? Bone testing in this case would be trivial (location is accurately known) but one does not just dig up Westminster Abbey.