That's good data as it shows the range of games that manage to secure relief (using 2016 reference):
Table Tennis Touch
Leonardo's Cat
Pumped BMX+
N.O.D.E
Beano Interactive Play Website
Gratuitous Space Battles 2
F1 Racestars (IOS and Android)
Overlord - the Fellowship of Evil
Battle Decks
Lumo's Cat
The Hungry Horde
Apple Bob
Gumball - Rainbow Ruckus
Little Raiders: Robin's Revenge
Worms World Party
Knave of Mazes
Clash of Fans
Worms 4
Downton Abbey (Mobile)
Cat Tap Fever
Formula One 2015 (F1 2015)
Chimpact 2
Chimpact Squash
Star Wars: Rise Against The Empire Playset
Worms 3
Beyond Eyes
Moshi Monsters Village
Room on the Broom: Flying
Gruffalo: Games
Bake Escape
Angry Birds Transformers
Disney Infinity 3.0
Disney Infinity: Toy Box Sports - Bowling
Warhammer 40,000: Deathwatch
Spinguins
Surgeon Simulator
I Am Bread
Rick and Morty Presents: Jerry's Game
Assassins Creed Chronicles
Tree Fu Tom: Magical Moves
Catchphrase Quest
Blink Escape
Spy Ops
Electric Lullaby
Total War: Attila
The Swindle
Until Dawn
Cartel Kings
Dirgelwch y Marcwis: Trysor Cudd
Night Zookeeper
Nova-111
Titan Attacks
Alien: Isolation
Tom Gates - Interactive Play Website
Zodiac: Orcanon Odyssey
OlliOlli
Pacca Alpaca - Playtime Travel
Total War Battles: Kingdom
Family Fortunes
Only Connect
Baum
Swapperoo
Tearaway Unfolded
ICC Cricket World Cup 2015 Cricket Quiz
QuizTix: Musicals
Monstrum
Tango Fiesta
Boomerang Make and Race
Goat Simulator
Goat Simulator: Mmore Goatz Edition
Prison Architect
Nom Nom Galaxy
Frozen Synapse Prime
Pokemon Art Academy
Elite Dangerous
Crater Craft
Re:Shakespeare
Mutton For Punishment
Art Academy - Atelier
Star Wars: Lightsaber Escape
Risk
Powerstar Golf
Football Kicks Frenzy
Dunky Dough Ball
Los 40 Principales Party Vol. 2
Spy_Watch
Animals Actually
Total War: Warhammer
Danger Mine
The Voice: I Want You
La Voz Vol. 3
Avakin Life
Rare Replay
Total War: Rome II DLC
Zombies, Run!
Wheels on the Bus
Angry Birds Pop!
Bubble Genius
Crafty Candy
Disney Infinity 3.0 - Twilight of the Republic Playset
Miniball Tap Football
Step Buy Step: A Pedometer Adventure
7 Minute Superhero Workout
Ancient Battles
Car and Truck Games for Kids
Peninsular War Battles
Russian Front
Dungeon Runner: Fitness Quest
Civil War (Hunted Cow Studios)
Not a Hero
OlliOlli2: Welcome to Olliwood
Atom Universe
Eldevin
Fallen Sword
Hell
OlliOlli (Rollingmedia)
Soccer Manager 2017
Operation: New Earth
Rebels & Redcoats
Tank Battle (Hunted Cow Studios)
Celtic Heroes
Loot Hound
Project Cars
Football Manager 2015
Nuts! - The Battle of the Bulge
Run The Joint
Overruled!
Petlandia
Awesome Awesome Aliens
Scary and Melon
Fruit Shake
Cubious
Twit or Miss
Tales of Iona
Football Manager 2015
Football Manager Online (Korea)
Football Manager 2016
Football Manager Classic 2015
Henri's Fair
Shaun the Sheep - Shear Speed
Escargot Escape Artistes
Learning Time with Timmy
Space Hoppers
Bacteria Combat
The Climb
Universal Credit - A Year of Change
High Steaks!
Seraph
Makies FabLab and Fashion
Teletubbies: Tinky Winky's Magic Bag
Teletubbies: Laa-Laa's Dancing Game
Teletubbies: Dipsy's Fancy Hat Maker
Teletubbies: Po's Daily Adventures
The Living Dungeon
Bloons Monkey City
Ouroboros
A Winter's Night
Solve-It-Blocks
Energy Island
Shadow of the Beast
3-2-1-Zombies!
Jolt
Word Party
The Room Three
Omega Agent
Caledon
Seagull Swipe
Driveclub
Forza Horizon 2 - Xbox One
Fire & Fury - English Civil War
Transformers: Earth Wars
Rival Kingdoms
100 Years' War
Graffiti Grinder
We can see only a few major titles (bolded), and a fair few educational titles. It's evident from the criteria that a lot of major A - AAA titles don't qualify. Also, the UK is still far from cheap even with tax breaks. Rent, food, transport, general cost of living (and so wages, and everything associated with wages like paying for goods) is higher than many European nations, particularly Eastern European. Compared to Germany, your personal reference, the 20% tax breaks for the games that can get them probably do make the difference. Otherwise the UK is not cheap to run a studio. NA and Canada offer far better tax breaks, while Eastern Europe and Asia offer cheaper work forces. The UK struggles, and only does as well as it does thanks to talent and culture.