UK, Ireland / Advice to Polish parents in the UK about weaning babies? [15]

I am a student nurse in the U.K. I am looking at the cultural differences between Poland and U.K.
I want to give advice to Polish parents in the U.K about weaning. Can you tell me at what age you start weaning your babies, and what foods you give them. I know that babies drink tea both fennel and camomile. any advice and information or direction to a site for further info would be great. thank you