The last syllable is usually pretty subtle, like the br- in bread, but very quietly voiced. I’d say I hear it maybe 75% of the time I hear the word. Currently in Yorkshire, via SW England, London and NW England. The syllable is a lot less subtle in a West Yorks accent!

Did you learn French at GCSE level? Possibly there’s a relationship between that and pronouncing the re like that in French-derived words. Cadre is another example. If it is related to learning French, then it’s probably on the decline as French teaching is on the decline and foreign languages are no longer compulsory at GCSE.

In some of the accents around here, blood, wood and food do rhyme, more or less.

British English voices those letters in most accents. I think the two silent letters is just a North American thing.

Similar to herb.