Well, for reasons I won't go in to, I was wrong. I need to write a bomb-proof will.
I thought I'd start with the AgeUK will writing kit, but, then again, it might be that, given the ever-so-slightly geriatric age profile of Chat, some of you might have some recommendations.
Yes, I do. By all means start with a will-writing website to focus your thoughts, but take it to someone suitably qualified to produce the document. It really isn't as simple as people think, if your affairs are at all unusual. Clients often used to bring me sensible instructions as to what they wanted, but would for instance not have thought about what to do if a particular beneficiary predeceased them, or if a child had divorced, or all sorts of not-uncommon possibilities.
And at the risk of disturbing certain people over on CAD, anyone living in their own home in London may well have to consider Inheritance Tax - there are simple provisions to avoid IHT on the near-term death of the second spouse, for instance.
You say you need your will to be bomb-proof i.e there is a possibility of challenge. In that case you need to make sure that you give written instructions making it clear what the problem is, so that if it doesn't work you don't have only yourself to blame. For extra reassurance, don't just go to someone who does wills in and amongst a bit of conveyancing - get someone who is a member of STEP. There is a searchable database here
http://www.step.org/ and all the better firms have someone who is a member.
And finally, don't take any notice of contributors here who tell you what specific provisions to put in your will. Not unless you believe in surgery by dowsing.