Scottish Liberal Democrat leader Willie Rennie has promised to "make Scotland the best again" at the party's Holyrood manifesto launch.

Rennie, speaking at a soft play area in Edinburgh, said Scotland had "slipped back" as a nation.

The NHS is now "struggling to cope" as a result, he said.

Rennie said: "For a long time our country has been one of the best in the world. Health services, the envy of so many others. World beating climate change targets. Civil liberties celebrated. A world leading mental health strategy. A police force deploying traditional policing by consent.

"Once we were the best but now we have slipped back. The OECD say our education is now just average. Our NHS is struggling to cope. We haven't met our targets in four years. Our police force is a shadow of its former self. We don't even have a mental health strategy."

He added: "This is not good enough for our country. Liberal Democrats want to make Scotland the best again."

The party has promised the "biggest investment in education" since 1999 and to spend £500m extra on mental health services over the next four years.

Rennie said: "For mental health we will double support for child and adolescent mental health services. We will stop young people having to wait up to a year for treatment. That will be an increase of £50m.

"New dedicated in-beds for young people will open in Aberdeen and Inverness. We will also invest in mental health professionals an A&E departments, with police and in GP practices to get the right help to people when they need it.

"Overall, we will add £500m to mental health over the next four years".

Willie Rennie also stated his opposition to a second referendum on independence. The manifesto rules out support for any referendum before 2021.

Rennie said: "We reject plans by others to devote the next five years to another debate on independence as we want to devote the next five years to focus on making Scotland the best again."