Despite his young age, it seems the Green is already something of a political veteran, having been part of the successful campaign to give 16 and 17-year-olds the vote in the independence referendum.

Image source, PA

He was 15 when he joined the Scottish Green Party and has also served as a member of the Scottish Youth Parliament, before contesting the East Dunbartonshire constituency in last May's general election.

He gained his new role as an MSP after being top of the Green list for the West of Scotland region.

Scottish Labour's Ken MacIntosh won a list seat in the West of Scotland region on a night when his party suffered some devastating defeats. 

Speaking to the BBC's Glen Campbell, he said: "I don't know what to feel - stunned and elated?"

Image source, bbc

Professor John Curtice
Polling expert

With all but one of the constituency seats left to declare, and information on the list vote available for most of Scotland, the BBC's forecasting team are predicting the final outcome of the Scottish election will be:

SNP 63

CON 31

LAB 24

Green 6

Lib Dems 5

Thus the SNP are expected to fail to win an overall majority while the Conservatives will displace Labour as the third party in Scotland.

Here are the results for the Highlands and Islands regional list: 

1. Conservative Douglas Ross

2. Labour's Rhoda Grant

3. Conservative Edward Mountain

4. Conservative Donald Cameron

5. Scottish Green Party John Finnie

6. SNP Maree Todd

7. Labour's David Stewart

The returning officer was concerned about potential irregularities following a complaint about the possible involvement of a member of staff in a conflicting activity.

Scottish Conservative Alex Johnstone says his party are enjoying the opportunity of winning back constituencies. 

Mr Johnstone says his party are a traditional Scottish party with Scottish values.

SNP leader Nicola Sturgeon has declared that her party has won a in the Holyrood election.

The SNP has won 58 seats so far, but it is not certain that they will reach the 65 seats required to win a majority in the 129-seat parliament, according to election expert John Curtice.

The Conservatives and Liberal Democrats have also enjoyed success but Labour's vote has fallen.

Image source, bbc

It looks increasingly likely that the Conservatives will finish second.

With the regional list results starting to be declared, the SNP has won 58 seats, the Conservatives 16, Labour 11, Liberal Democrats four and Scottish Greens four.

Ms Sturgeon held her Glasgow Southside seat with a majority of almost 10,000 votes as the SNP won all eight seats in the city - including four from Labour.

Conservative John Lamont holds Ettrick, Roxburgh and Berwickshire. 

Image source, bbc

Professor John Curtice
Polling expert

UKIP have once again struggled to make much impact and the party seems set to win little more than 2% of the list vote north of the border.  

Scottish Labour leader Kezia Dugdale says it has been a "very bad night for the Labour party".

Ms Dugdale says she wants to see the parliaments new powers being used because in reality, without doing so, Scotland faces another £3bn of cuts.

She says that "no matter what" she will remain in charge of the Scottish Labour party. 

Brian Taylor
BBC Scotland Political Editor

Kezia Dugdale, returned as a Lothian list Labour member, says that steering clear of the constitution in this election cost her party votes. 

Says they tried to move on. 

Scottish Green Party co-convener Patrick Harvie says he is on tenterhooks to see if his party can come fourth in this election.

Mr Harvie says it is clear his party has gained huge momentum, particularly in Glasgow.

Image source, bbc

He says the Greens have gained a lot of profile during this campaign.