Bit of an update. Said when leaving yesterday they'd be here at 8am today. So up at 7.30 - unheard of here on a Sunday, except when working. At 9 am got an email from them with some pics they'd tried to send me yesterday. And I know what time he first tried to sent the pics, as he wanted my Wi-Fi log in details.
At 11, I emailed them to ask if they were coming. Got a reply that the other chap that was here yesterday is ill and went for a covid test which proved positive.
But before 11, plenty time to ponder on events with a neighbour who dropped in for a coffee.
And I realised they had started ripping things out before I'd agreed on the revised quote. Now as soon as they got up to the roof it must have been obvious they couldn't do the job they'd quoted for.
They were going to simply felt over felt. Seems that not possible since it had the then standard loose pebbles on top of the old felt. Obvious as soon as the eyes got to the top of the ladder. Same with the slates the felt had to go under, at the far end of the flat roof. And they'd started to rip off the slates before I'd agreed the new price - and the top layer of old felt. As the pics sent show.
But the good news is weather forecast dry for the next few days. As otherwise, water would p**s in everywhere.