Which is brick and the legendary Sussex bungeroush ….
The weight will mainly be taken by the brick …
To hold 3 windsurfing boards + sails + masts
What do I need to use — normal screws and rawlplugs … or something else ?

Personally I would mount wooden battening along the wall first with expanding bolts then screw hooks or whatever into the wood.
Makes moving or adding hooks a lot easier.

Btw Sussex bungeroush ?

A quick Google has answered my question. We don’t build using that method in Worthing hehe !

If fixing into the brick then use thunderbolts.

would have gone the wooden batten route ….
off to look at thunderbolts

Re Bungeroush and Worthing … if it’s not screwed down in Worthing it won’t be there …

Will thunderbolts work on brick, rather than concrete?

Depends on the brick. Some are too hard. You also need to be well away from the edge.