Last year, when a pair of Tawnies were regularly visiting, my neighbour (an avid cyclist, by the way, but I don't think he reads this forum) said to me "Do you think they have babies?". "No, Mike." I replied, "They lay eggs." His missus nearly peed herself, and he's hardly spoken to me since. To placate him, unbeknown to me, Mrs Poacher promised that I'll make a nest box for them. I don't have any suitable timber or ply, and I'm damned if I'm shelling out good money for any, so I've taken to scanning skips for suitable offcuts, without success so far.
Anyway, to get finally to the point, RSPB has two designs, an upright with a roof, and a chimney type to be mounted diagonally under a branch. Can you advise me which is more likely to be used? I reckon the vertical one is more likely to replicate the kind of cavity they're likely to find naturally, but if I make and fit one of those, Mike will probably demand that I include a ladder for the owlets to climb up.