Hello all my first post so please be kind

We have recently adopted a 2 year old Staff from a friend of a friend, hes a lovely dog but we where told when we got him he would only poo in the garden, not ideal for us.

For the first while we let him do his business in the garden whenever he liked (bad idea I think with hindsight). We are now trying to re-train him to go to the toilet while walking and struggling totally with it.

We can't seem to get him to poo before work which then leads to accidents inside the house during the day, in the evening its not quite so bad but still a struggle to get him to poo while walking, I'm sure he would be fine if let back into the garden.

Anyone have any hints or tips for us on this one?

TIA!