Whoops, I should have said that it’s a brick shed but with quite a thick wooden door.
As others have said, there is no point fitting a very expensive padlock if it can be easily bypassed. So things to think about:
– is the hasp and staple going to be the weak link?
– similarly, external strap hinges are easy to overcome.
– does the shed have a window? It might not be possible to get a bike out through it, but it makes it easier for someone to look in and decide if its worth going to the trouble of breaking in.
– if you are storing a £5,000+ superbike in there, I would think again. There comes a point where no matter how much physical security you install, the contents are so attractive to thieves that they will spend their time overcoming them, e.g. going in through the roof.
At the end of the day, padlocks are generally low security locks, and the open shackles can be pried open relatively easily. Proper high security padlocks are like these:
Chubb Battleship close shackle padlock
Better still, a concealed shackle padlock
EDIT Check the door frame as well: given the nature of the shed/out house, the frame may not be very well secured to the walls, and might need additional fastenings. You can also fit hinge bolts to stop someone levering the door open from the hinge side.