Hadn't I read this right after The Long Tomorrow by Leigh Brackett maybe I would have liked it even more. Where The Long Tomorrow had a clarity of focus, a thesis it went on to thoroughly explore in the entire book, and an interesting conclusion (where neither of the conflicting viewpoints were presented as immediately better, and the reader can think for himself) - this aspect was lacking in The Day of the Triffids.

The original blinding calamity and its fallout were interestingly handled and also explored nicely. But the titular triffids just felt added to increase the tension very slightly, and they played almost no significant role for 90% of the book.

It still is a good book, and I'd recommend it. And I loved the british vocab.