Home buyers report has a few concerns about the roof looking for some honest advise

Without looking at the roof it is impossible to comment, you need to contact roofers to come out and do a more detailed survey report for you, this normally costs from £100-£250 depending on location and size of the property. You can get local roofers, directly from this site by posting a job lead. Regards Frankie BT Roofing Services

Good evening, From your description only, it doesn't sound like you've got much to worry about right now. I would make preparations for repairs to be done before next winter hits you, however. Typically, once elements of a roof start to fail due to age (it sounds like this could be the case with your roof), you will be chasing your tail for a matter of years, replacing bits and pieces and paying usually more for small amounts of maintenance work over time. Slates are notoriously tricky to 'fix' once they start to fail. You have to install a lead strap (or copper is preferable) to hold the slate and that's it, the slate is being held in place with a strap. This works fine but if any of the damaged slates are higher up the roof and not accessible from gutter height, typically a roofer will lay a roof ladder onto the roof which I can almost guarantee will damage more slates (if they are old, they will be thin and starting to shale, further weakening their strength). With regards to the flat roof, if it's not leaking, leave it alone for now. Lead flashing on the small bay window is a nice little job that a local roofer will be able to fit in 1 day some time and will not cost the earth. I do not know measurements of the bay window/lead flashing so cannot provide a 'rough price' for what it would cost should you live in my area nor can I determine access requirements etc but this is not a big job. I would begin looking for a reliable roofer in your area to come and carry out the lead flashing replacement on your bay window and while they are there, ask them to provide you an honest opinion of the overall condition of the main roof. Feel free to get in touch should you have any further questions. Best regards, Bradley.

I would look at the rest of the houses down the street. If over half have new roofs. Then you would be looking at replacing the roof sooner than later. But you Description of your roof sounds like you will be replacing it

If it was local to me I would inspect and give quote for free. Judging on what your saying I would say its nail dead . Nails in batten have deteriorated