Three old nest boxes ready for you to put up before National Nestbox week on February 14th (https://www.nestboxweek.com).
Have sat in my garage for a while, so hoping someone here would have more likelihood of putting them up than me. Dusty and some could do with a bit of TLC, but serviceable.
The top right one was occupied by bluetits and/or greattits in the past (probably both, but I can't remember which). It could do with better waterproofing/fixing on the lid, but I think it's the best of the three. I would say that because I made it.
The string/rope one is probably meant for wrens who like to be hidden away in shrubby undergrowth.
The internet will tell you about how to site a nest box.