DIY severance of joint tenancy

We severed our Joint Tenancy in 2007, the solicitor did it. Along with the application there was another separate document which said all this:

Notice of Severance of Joint Tenancy

1.) (a) We are the joint owners of the property full address is typed in here ('the property')

(b) We hold the Property and the future proceeds of sale on behalf of ourselves as beneficial joint tenants so the in the event of the death of either of us the survivor will become the sole owner

2.) Having regard to the considerations of inheritance of our estate it would be preferable to convert our beneficial joint tenancy into a tenancy in common so that we each have the right in future to dispose of our individual interest in the Property and its proceeds of sale under our respective Wills.

3.) Accordingly by virtue of the proviso to section 36(2) of the Law of Property Act 1925, each of us hereby gives notice to the other of our desire to sever as from the date of this notice our joint tenancy in equity over the Property and we hereby separately declare that the joint tenancy is thereby duly severed in equity to the intent that we shall from the date of this notice hold the Property and the future proceeds of sale as tenants in common in equal shares.

Dated this 4th day of September Two Thousand and 07

.......................................
JOHN ALBERT DOE


.......................................
JANE AMANDA DOE

Obviously, own names & signed on the dotted lines. The green text we WROTE in ourselves on signing, there was a typed line under the 07.

Word for word, distinct lack of punctuation as is the legal way, layout lines up a little neater than I can show here.

TBH I've no idea if this is what might be referred to as the "Deed Trust" but if it's not there was nothing else apart from the form.