The 37-year-old fell ill at the Pleasuredrome gay sauna in Cornwall Road, Waterloo.
Howarth is in London as part of the Arresting Uber campaign to topple the ride-sharing giant.
West Yorkshire Police step up patrols in area following 'disgusting' sexual assault on Friday.
'The trigger man will be blamed, while those who actually ordered Nemtsov's killing will go free,' tweeted party colleague.
A paper from the Royal United Services Institute shows how budget cuts could affect armed forces.
Ironically, murder suspect Zaur Dadaïev was repeatedly decorated for "bravery" by Russian officials
The Boys Who Like Boys survey questioned more than 1,000 gay teens aged between 14 and 19.
Radioactive rubbish sits in blue and black plastic sacks in Fukushima four years after the tsunami.
BREAKING: A relative of kosher supermarket gunman and a policewoman among those in custody for terror attack.
Carbon-14 results on bones potentially belonging to Mona Lisa to be revealed.
Four Filipinos, two Europeans, two Bangladeshis and a Ghanaian are being held hostage by suspected Isis-backed men.
Fear, repression and injustice cast a dark shadow over the first-ever European Games in Baku.
Haaretz investigation shows torture cases have risen since murder of three Jewish teens last year.
Traders questioned over alleged manipulation of Euriobor lending rate.
Sir Bernard Hogan-Howe tells LBC security cameras need to be positioned at face level.
People throw coloured powder and water at each other to celebrate Holi, the festival of colour.
French Prime Minister warns of danger posed by thousands of radicalised Europeans joining the group.
Label on shirts of Super League team Pusamania Borneo criticised for being sexist.
UN chief Ban Ki-moon calls IS destruction of ancient artefacts a 'war crime'.
Union survey suggests flagship welfare scheme in in 'disarray' because of lack of staff and poor IT.
Suspicion likely to fall on Tuareg separatists, which aim to overthrow the current government.
International Women's Day is celebrated on 8 March.
The victims, aged from their 50s to their 80s, lived in Sumoto, western Japan.
Cash-strapped Greece expected to provide details about its tobacco reform proposals soon to obtain future bailout funds.
Hardline nationalist Avigdor Lieberman rallies electorate ahead of key national elections.
Parrots attack opium fields in large numbers and slurp on the milk oozing out of cuts made in the pods to ripen the yield.
Malaysian civil aviation authority's interim report also flags expired battery and Vietnam ATC delay.
In a landmark attempt to promote green energy, pilots attempt to fly around the world using solar energy.
The Indian TV network protested at the ban of 'India's Daughter,' which focuses on the brutal gang rape of a Delhi medical student in 2012.
Toddler found alive strapped in her car seat with the car resting facedown in the river for over 14 hours.