Piece of lead on top of timber & set the waste thread end on it & scratch the diameter on the lead with a screwdriver. Then a hammer & screwdriver inside the line to cut the hole.
Beat the lead flat and, using a round file get the hole a nice tight fit for the waste.
Trim the size of the overall lead with tin snips or a knife.
Boss white the lead a little & then stick the putty on it.
Put it & the waste on the basin & gently hammer lead roughly down in place.
Add a little more Boss White to this side of lead (to seal & lubricate) & tighten waste nut, while keeping the overflow slot in line with basin overflow.
Hammer lead around the area. Trim any extra lead with a knife if needed & clean excess putty both sides of basin.
And people think adding silicone & a washer is a nuisance nowadays!