sorry, slightly wrong. Peppers do self-pollinate by the breeze shaking
them. In a greenhouse there's less air flow, so it's insects more
there.

Btw forgot to say, peppers take their time to get started on
flowering. Then they go for it.

There's a cherry mini sweet pepper (as opposed to the hot version). In
2005 that produced loads of fruit. Growing more this year and again
they could do well. Perhaps in our climate the smaller peppers are
better choices than the normal block type which seem to need more heat
to develop thick walls.