This is a short video showing how to adjust the advance locking block on the P line and T line Brompton folding bike

What's the locking block?

It helps keep the bike locked in the folded position - so when you pick up the bike it stays folded

If it is adjusted / set up badly then one of two things can happen

1/ the bike unfolds when you pick it up (when you don't want it to)

2/ the seat post doesn't go down correctly (it catches) when you are trying to fold the bike

We show how it can be adjusted to run as designed