It was already a memorable evening: Mo bowing out with a silver; the women's 4x100m team winning silver; but the best was yet to come. Up against the mighty USA and Jamaica, the men's sprint relay squad pulled off a major coup winning gold. Usain Bolt in his final track appearance pulled-up with a hamstring problem on the home straight, much to the disappointment of the crowd, but even had he not, it was debateable whether he could have changed the result. Unchanged from the heats, the team of CJ Ujah, Adam Gemili, Danny Talbot and Nethaneel Mitchell-Blake delighted the crowd with slick baton changes roaring home in a world-leading 37.47s. It was a well-deserved victory.
The 5000m did not follow the script, on Sir Mo Farah's final championship track appearance. With the Ethiopians working a as a team, and the effects of a tough 10,000m still in his legs, Mo was blocked in on the home straight. He pressed hard for the line passing two of the Ethiopians and Chelimo, but Edris was too far ahead to be caught. It was somehow fitting that Mo's amazing run of world and Olympic golds should be bookended by silver. Clearly emoitional, Mo was able to receive the adulation of the crowd for a sensational career. Certainly Britain's greatest ever athlete. Confirming himself as one for the future, Andy Butchart followed up his Olympic 6th place finish with 8th place in the world championships.
The women's relay squad - also unchanged from the morning's heats - came home in second behind the USA, and ahead of the Jamaicans. If their changes had been better they may even have claimed gold - their time (42.12s) was slightly slower than in their impressive heats run. As it was, Asha Philip, Desiree Henry, Dina Asher-Smith and Daryll Neita can celebrate a well-deserved world silver medal.
The evening session also saw an enthralling high jump final. Britain has never had a female high jumper in a world championship final. Tonight they had two with heptathletes Morgan Lake and Katarina Johnson-Thompson. Both cleared 1.95 - a season's best for KJT - with just one failure on the way. 1.97m was a bridge too far for both, finiahing 6th and 5th respectively. An impressive achievement for both of them. The Russian Lasitskene, competing as an authorised neutral athlete, won the competition with 2.03m.
The decathlon came a to a conclusion, with Frenchman Kevin Mayer winning with 8768pts. British decathlete Ashley Bryant broke the 8000pts barrier, hauling himself from 19th to 11th place during the day to finish on 8049pts, impressing in the javelin and 1500m.
In the morning, both British 4x400m squads claimed a place in the final. The women came second behind the USA in a time of 3:24.74. The men found it more difficult in a stacked heat, progressing through finishing as fastest losers in a time of 3:00.10.
Crowd favourite Sally Pearson won the sprint hurdles gold in 12.59s from Harper-Nelson. In the men's javelin final, Vetter took gold in 89.89m from Vladejch's 89.73m.