The 5 best shows on TV tonight: Wednesday 19 May

A documentary exploring a trial testing psychedelic drugs as a treatment for depression airs tonight.

The interesting film follows a team of scientists and psychotherapists over the course of 16 months as they compare it to a standard antidepressant.

Continuing shows include Johnny Vegas' Carry on Glamping in its second-to-last episode as well as Sewing Bee - and it's Reduce, Reuse, and Recycle Week.

Read more: Kristen Bell took magic mushrooms to treat depression

Royal fans can also have a look into the lives of royal mothers-to-be and how things have changed over the years in a Channel 4 documentary.

Martin Lewis' Extreme Savers - 8pm - ITV

The financial guru meets with more people going to extremes to keep their expenses down.

This week he meets a woman who managed to get herself out of debt and started saving for her own home by living in her sister's garage.

Martin also meets a family who keep food costs at a minimum by foraging.

The Great British Sewing Bee - 9pm - BBC One

It's Reduce, Reuse and Recycle Week in the sewing room as the usual contents of the haberdashery are replaced with charity shop clothes and soft furnishings.

Read more: Seann Walsh suffering anxiety and depression since Strictly kiss

First up is the task of making a gentleman's waistcoat out of the second-hand materials provided before moving on the Transformation Challenge where the sewers must work their magic on changing army surplus items into stylish garments for a woman.

In the final test of the episode, denim dresses are created out of old jeans for the Made to Measure.

The Psychedelic Drug Trial - 9pm - BBC Two

This documentary follows a trial at Imperial College London testing how a psychedelic drug (psilocybin - the active ingredient of magic mushrooms) holds up as treatment for depression against a standard antidepressant.

The film comes as over seven million people are prescribed antidepressants each year in England.

It charts the trial over 16 months, looking into the short and long term impacts on participants.

A Very Royal Baby: From Cradle to Crown - 9pm - Channel 4

Ahead of the birth of Prince Harry and Meghan Markle's second child, this Channel 4 programme dives into the pressures faced by expectant royal mothers and how protocol has changed over the years.

The programme combines archive footage and interview to tell the story of royal births.

Johnny Vegas: Carry On Glamping - 10pm - Channel 4

The penultimate episode documenting the comedian's endeavour to open a clamping site airs tonight.

Read more: The Inbetweeners car is up for sale

Time is running out for the Maltese bus to be finished and Johnny's testing craftsman Pauleo with last minute design changes.

Meanwhile, assistant Bev is up in Yorkshire tending to the site.

Watch: Princess Beatrice is expecting her first child