Strawberries
Raspberries
Tayberries
Blackcurrants
Plums
Blackberries
Gooseberries (ready-picked only)

Broad Beans
Spinach / Swiss Chard
Courgettes
French Beans
Onions
Beetroot
Squashes (4 varieties)
Tomatoes
Marrows
Sweetcorn (supersweet)

http://www.bbc.co.uk/food/recipes/ 
for recipe ideas

http://pickyourown.info/
for recipes, seasonal ideas, etc.

http://news.bbc.co.uk/weather/forecast/4289?area=Enfield 
for local weather forecast

http://www.metoffice.gov.uk/weather/uk/se/barnet_forecast_weather.htm
for more detailed weather forecast