All Doctor Who Monthly Adventures numbered between 101 and 150 — variously starring Paul McGann, Peter Davison, Colin Baker and Sylvester McCoy — will decrease from £12.99 to £7.99. 

Also seeing price reductions are series 1 to 4 of The Companion Chronicles, enhanced audiobooks which explore past adventures of the Doctor from the perspective of his trusty companions. Current prices of £7.99 and £9.99 for the individual adventures will plummet to just £2.99.   

The Doctor Who Monthly Adventures decreasing in price to £7.99 each are: 

Absolution 
The Mind's Eye  
The Girl Who Never Was 
The Bride of Peladon 
The Condemned 
The Dark Husband 
The Haunting of Thomas Brewster 
Assassin in the Limelight 
The Death Collectors  
The Boy That Time Forgot 
The Doomwood Curse 
Kingdom of Silver  
Time Reef  
Brotherhood of the Daleks 
Forty-Five 
The Raincloud Man 
The Key 2 Time - The Judgement of Isskar 
The Key 2 Time - The Destroyer of Delights 
The Key 2 Time - The Chaos Pool 
The Magic Mousetrap 
Enemy of the Daleks  
The Angel of Scutari  
The Company of Friends  
Patient Zero  
Paper Cuts  
Blue Forgotten Planet  
Castle of Fear  
The Eternal Summer  
Plague of the Daleks  
A Thousand Tiny Wings  
Survival of the Fittest  
The Architects of History 
City of Spires 
The Wreck of the Titan 
Legend of the Cybermen 
Cobwebs 
The Whispering Forest 
The Cradle of the Snake 
Project: Destiny 
A Death in the Family 
Lurkers at Sunlight's Edge 
The Demons of Red Lodge and Other Stories 
The Crimes of Thomas Brewster 
The Feast of Axos 
Industrial Evolution 
Heroes of Sontar 
Kiss of Death 
Rat Trap 
Robophobia 
Recorded Time and Other Stories 

The Companion Chronicles adventures seeing a cost reduction to £2.99 each are: 

Frostfire 
Fear of the Daleks 
The Blue Tooth 
The Beautiful People 
Mother Russia 
Helicon Prime 
Old Soldiers 
The Catalyst 
Here There Be Monsters 
The Great Space Elevator 
The Doll of Death 
Empathy Games 
Home Truths 
The Darkening Eye 
The Transit of Venus 
The Prisoner's Dilemma 
Resistance 
The Magician's Oath 
The Mahogany Murderers 
The Stealers from Saiph 
The Drowned World 
The Glorious Revolution 
The Prisoner of Peladon 
The Pyralis Effect 
Ringpullworld 
Bernice Summerfield and the Criminal Code 
The Suffering 
The Emperor of Eternity 
Shadow of the Past 
The Time Vampire 
Night's Black Agents 
Solitaire 

The Doctor Who Monthly Adventures (#101-150) will each be available to own for just £7.99 (downloads only) from this website. Big Finish listeners can save even more money by purchasing these releases in bundles of varying categories — with the new prices ranging from £18 to £90. 

The adventures in series 1 to 4 of The Companion Chronicles are available to purchase for just £2.99 (downloads only) per title. Series 1 and 2 of The Companion Chronicles can each be bought in bundles for just £11.80 (per series). The bundle price for series 3 and 4 have also plummeted to just £35 (each). 

Due to increased production and supply costs, the price of forthcoming collector’s edition CD and download box sets (and associated bundles) will soon be adjusted in order to safeguard our ability to continue producing the stories listeners love.

However, no product price increases will come into effect until 01 November 2022 and none of these will affect the cost of already-released box sets. In short: if you would like to pre-order forthcoming releases at 2022 prices, you should do so before this date.