The bike has no centre stand, so you need a jack to lift it.
Remove the brake caliper, and support it with cable ties
After the fork leg has been removed, stripped and cleaned, you need to drive the top bush back in. I used a piece of 40mm plastic drain pipe to do this.
The new fork seal needs to be protected from damage - this can be caused by pits or marks on the top of the fork leg. I wrapped the leg in food wrap, which I oiled with fork oil before sliding the seal into place.