The kit I had on the bike when I done PBP was:
Two innertubes, tyre levers, multi tool, pliers, spoke wrench, spokes, pump, ibuprofen, hydration tabs, sun cream, shot blocks, arm warmers, leg warmers, overshoes, eye mask, toothbrush, 18650 batteries, AA batteries, toothpaste, ear plugs, light waterproof jacket.
And on me I had my phone, passport, money and brevet card.
Will be probably be the same more or less when I do LEL, save for not carrying so many tools as they are not needed, only a multi tool until you can get to the next control.
In the drop bags I'll probably go with change of clothes, some shot blocks, and some spare batteries.