Transport in Somerset a harbour at Southampton. Hot springs were discovered near where the Fosse Way crossed the River Avon and the town of Aquae Sulis (now the city of Bath) developed there. Just a little further north the Fosse Way crossed a long road between London and Sea Mills. The waters of the Bristol Channel and rivers such as the Avon were used for transport. The small vessels in use at that time could navigate quite some distance upstream, indeed the River Yeo shows evidence of being straightened near Ilchester. Harbours were established near river mouths at Sea Mills (River Avon), Uphill
Aphanizomenon flos-aquae samples exceeded the safety value of 1 µg microcystin per gram. University professor Daniel Dietrich warned parents not to let children consume "A. flos-aquae" products, since children are even more vulnerable to toxic effects, due to lower body weight, and the continuous intake might lead to accumulation of toxins. Dietrich also warned against quackery schemes selling these cyanobacteria as medicine against illnesses such as attention deficit hyperactivity disorder, causing people to omit their regular drugs. A Canadian study studying the effect of "A. flos-aquae" on the immune and endocrine systems, as well as on general blood physiology, found that eating