FOI - Water fountain installations

A press release from your office on Friday 12th October 2018 declared, among other things:

• "A new £5million scheme will help to create a network of hundreds of free public water fountains across busy areas of London...from Spring 2019"
• "The new network of fountains is in addition to the first 20 the Mayor is already delivering this year across London."
• "TfL is currently reviewing suitable sites, including its bus network, overground and underground sites."

At the time of the press release, the locations of 20 fountains were also announced. This is the release.

Please could you tell me:

1. How many publicly available drinking fountains are installed and active in London (excluding establishments which permit the public to refill their bottles for free)?
2. How many of these have been installed since that press release/ announcement last October?
3. How many have been installed so far this year?
4. How many are still in active use/ functioning?
5. How many sites have been identified by TfL as suitable for a drinking fountain? (A note on this: I already FOI'd TfL and their response was: "Unfortunately TfL does not hold the information you have requested. Please contact the Mayor’s office for this information.")
6. how much of the £5m fund has been spent?
7. How many people applied by the deadline of Dec 7 2018 to 'host' a fountain?
8. How many fountains are expected to be installed this year in total?