"according to my list only 4 out of 30 stabbings, proved to be fatal during the same period in 2018."
This link shows the following,
https://www.google.com/amp/s/inews.co.uk/news/uk/london-violence-list-murder-victims-killed-in-the-capital-so-far-this-year/amp/
January 3
Elizabeta Lacatusu, 44. stabbed to death at an address in Norfolk Road, Ilford
January 8
Daniel Frederick, 34. The Hackney resident was stabbed close to where he lived in Shakespeare Walk, Stoke Newington. He later died in hospital.
January 11
Harry Uzoka, 25. The model was stabbed to death in Shepherd’s Bush
January 28
Yaya Mbye, 26. The victim was rushed to hospital after being found with stab wounds at the George Downing Estate in Stoke Newington
January 29
Juan Olmos Saca, 39. Police attended the scene of an altercation at a residential address in Atwell Road, Peckham, where Mr Saca had been fatally stabbed.
January 31
Khader Saleh, 25. He was stabbed to death at Wormwood Scrubs prison in west London
February 3
Kwabena Nelson, 22. The first of two murders on February 3, Kwabena Nelson, a youth worker from Tottenham, sustained multiple stab wounds in St Mary’s Close in Haringey.
Hasan Ozkan, 19. Police believe Mr Ozkan was “singled out” by a group who wished to cause him harm, and died after being stabbed multiple times in Abbey Road, Barking.
February 9
Hannah Leonard, 55. Two people have since been charged with Ms Leonard’s murder, after she was stabbed to death at a flat in Camden.
February 11
Sabri Chibani, 19. The Italian national was attacked at a house near Streatham Common, before staggering outside and collapsing in the street. A post-mortem investigation found Mr Chibani had died from a stab wound to the chest.
February 14
Promise Nkenda, 17. Mr Nkenda became the youngest London murder victim at that point of 2018, when he was stabbed to death in Goldwing Close, Canning Town.
February 18
Lewis Blackman, 19. The Camden rapper, known to friends as Dotz, was stabbed at an address in Kensington.
February 20
Abdikarim Hassan, 17. Mr Hassan was the first of two young men to be stabbed in the Camden area
Sadiq Aadam Mohamed, 20. Mr Mohamed died at the scene where he was stabbed in Bartholomew Road, Camden
February 25
Michael Boyle, 44. The man from Galashiels, Scotland, was stabbed at the Sir Robert Peel pub in Southwark
March 5
Kelva Smith, 20. A 14-year-old boy has since been charged with Mr Smith’s murder, after he was fatally stabbed outside a nursery in Albert Road, South Norwood.
Laura Cecilia Navarrete De Figueira, 47. The mother-of-two was stabbed to death at her home in Twickenham
March 14 Lyndon Davis, 18. The teenager was assaulted on Padnall Road, Chadwell Heath, and was later found suffering from a stab wound on nearby Nash Road. He died at an east London hospital a few hours later.
March 17
Russell Jordan Jones, 23. Mr Jones was one of two people who were stabbed and shot in an attack in South Street, Enfield
March 18
Tyrone Silcott, 41. Police were called to reports of a stabbing on Towpath Walk in Hackney.
Naomi Hersi, 36. The trans woman was found with knife injuries at an address near Heathrow Airport in Hounslow, and pronounced dead at the scene 30 minutes later.
March 19
Balbir Johal, 48. Two men have been charged over the murder of Mr Johal, who was stabbed in Marlborough Road, Southall on March 19.
Jermaine Kevin Johnson, 41. Police attended the scene of a stabbing at Vallentin Road, Walthamstow
March 20
Beniamin Pieknyi, 21. Five people have been charged over the murder of the 21-year-old after he was stabbed to death at the Stratford Centre shopping complex in east London.
I make that twenty-four knife-related deaths in the same period last year.