UK bank accounts and inheritance

I have substantial sterling deposits and investments in UK banks. Do I need to create a separate UK will in addition to a will in France? Will my UK money be subject to French inheritance tax? 

Your bank will require a grant of probate in the UK in order to dispose of these holdings and, to simplify matters for your executors, an English law will is advisable.

If you die French-resident, your worldwide estate is French taxable, in which case due credit should be given for any tax or duty paid on the same assets in the UK.