I've heard if you plant your broadbeans in spring you tend to avoid chocolate spot (not sure why though)..
Chocolate spot is a fungal disease - as overwintering beans have to endure all sorts of weather, the plants are at risk of tissue damage which is an entry point for most diseases. Winters generally tend to be wet - a mild winter is worst as the fungus will be quietly growing undetected and then appear when conditions are right. Damp conditions are favourable to fungi and allow spores to settle more readily so it spreads rapidly especially when plants are grown close together. When you sow in spring, the likelihood of chocolate spot is reduced except if the weather turns wet for long periods into the summer months when the plants mature.
Last year I was late sowing and planting out a lot of stuff due to moving plots and this actually worked in my favour - as my neighbours were complaining of stunted growth and poor harvests due to the wet conditions, my crops caught the tail end of it all and by the time we had the warm dry spell from mid-July, they were fine and I did well. The overwintered onions were the biggest casualty as they did not get the dry conditions to die back and instead swelled up and split but the maincrop were perfect. The garlic was so-so - not the best year but not a total disaster. First and 2nd early potatoes were fine except for one or 2 casualties as a result of blight, but the maincrop was awful - not from blight as I cut the tops off, but the spuds were riddled with slug holes. The other casualty was my outdoor tomato plans - I had umpteen seedlings in the greenhouse waiting to be planted out but after having experienced devastating blight on outdoor toms in the past, with all the constant rain I didn't take the chance and instead composted the lot.
This year I'm late again due to the long cold spring and unable to get to the plot for other reasons, and this has had a knock on effect - bed preparations have been much slower due to the overly wet plot and needed a lot more sharp sand, compost and manure digging in to break up the heavy clay, my first batch of sweetcorn failed and planting out has been badly delayed. However, this warm spell has certainly moved things along and even a very late second sowing of sweetcorn has caught up and equivalent to last year's progress so I'm very hopeful they'll be fine, outdoor tomato plans take 2 are cracking on (fingers crossed we don't get a wet August which has happened before ... with dire consequences), squashes doing exceptionally well. The downside is that the remaining beds I did not have time to prepare have dried out into concrete, it's too hot to do such heavy work clearing them (last weekend I nearly made myself ill just trying to plant out the cabbages and sprouts) and I still have lots of other things yet to put in ... the sweetcorn, cucumbers and calabrese are quickly becoming pot bound in this heat, and work is getting in the way of going down to the plot except at weekends
The ongoing heatwave is also taking its toll on the soil and most of my time now seems to be watering issues - the potatoes seem to be worst affected at the moment.
Chillies, peppers and tomatoes in the greenhouse and polytunnel are well on course for a bumper year