Inheritance Tax
Inheritance Tax (IHT) is paid on estates over and above a tax relief called the Nil Rate Band (NRB), which is currently £325,000 per person. Assets left between spouses, whether direct or via trusts, are free of IHT. In addition to the NIL rate band, there is now a transferable main residence allowance which rises to £175,000 per person by 2020/2021. This only applies where property is left to children (see: https://www.gov.uk/hmrc-internal-manuals/inheritance-tax-manual/ihtm46034) for definition. The rules are complex. Seek guidance.
