1. No.
2. No.
However I can recommend that you get hold of a copy of a book published by the Consumers' Association (i.e. 'Which?'), called 'Wills and Probate'. At one time it was available in almost every public library in the country, so you might still find it there. Otherwise it's easy enough to find on eBay:
https://www.ebay.co.uk/itm/122581178537
(It won't matter if you find an older edition. Although the laws relating to intestacy have changed over the years, those relating to wills have remained the same).
Once you've done that, I suggest drafting your own will, based upon what you've read. If you're 100% sure that you've got everything covered, go ahead and sign it in the presence of two witnesses (who must not be beneficiaries of your will). If you've got the slightest doubts about it though, take your draft to a solicitor and say "I just need this tidied up".