By Ria Chatterjee

They are weapons that kill that can't be bought in shops. So why is it so easy to buy zombie knives online?

ITV News London has seen evidence that getting hold of these banned knives takes a matter of days and costs just a few pounds.

We can reveal that they can be bought illegally online in just a few clicks with no checks on who is buying them and whether they are children.

The Mayor has told ITV News London there is 'no justification' for that. Ordering banned knives online is illegal.

A 16-year-old boy came to us and said 'this is what can happen'. As an anti-knife crime charity we wanted to make sure that parents - teachers - knew and could block wish.com or any other website from their systems. ELIZA REBEIRO, Lives Not Knives charity

The charity Lives Not Knives filmed the process. Eliza Rebeiro contacted ITV News London with her concerns.

We're basically saying that we can't buy this at a high street store. This wouldn't even be acceptable to have on display in a store - let alone be sold. We should be doing exactly the same online. You can see them being used on Snapchat or being flashed around. With everything that's going on and the amount of young lives - or any lives being lost in London at the moment we were extremely disgusted how easy it was for us to obtain this. ELIZA REBEIRO, Lives Not Knives charity

What's more the knife arrived under false pretenses.

This is the one we actually ordered - no where does it say anything about cake tool or anything about how it was described in the actual box it came in. ELIZA REBEIRO, Lives Not Knives charity

It says on the box 'CUSTOMS DECLARATION - MAY BE OPENED OFFICIALLY'. So, it's got through without anyone checking it, without anyone opening it. If I've ordered - and it says 'Zombie Knife' that's what needs to be written on the description. ELIZA REBEIRO, Lives Not Knives charity

Eliza handed the knife over to the police and ITV News London made contact with the Home Office and wish.com.>What checks and balances are in place at Border Control was one question to the government. And to wish.com - a marketplace that hosts various vendors - why so many different types of weapons available for purchase without thorough checks?

Wish.com sent through a statement saying merchants on their platform must adhere to local laws. They said they were frustrated and disappointed to learn of the breach of their site's terms of use. And, they said, with immediate effect "we have removed these products from our platform".>The Home Office said: "The Offensive Weapons Bill currently before Parliament, will make it an offence to possess certain offensive weapons in private and stop knives being sent to residential addresses after they are bought online."

And, on border control they said officers undertake targeted examinations.>Letitia and Abigale have both felt the devastating impact of knife crime.

I've seen samurai swords - 16 inches all the way down their leg. And I'm thinking - you couldn't have gone to the corner shop for that, you couldn't have got that anywhere in this country. ABIGALE WRAY, Lives Not Knives charity

I find it really disgusting that moral compass, that attitude, that some companies have in regards to choosing business over morality - they just want to make money. Only time a person may be affected or feel like they want to take action is when it reaches their own front doorstep. LETITIA ROBB, Lives Not Knives charity

With the internet now a go-to place for buying things there will be a spotlight on whether the law is strong enough when it comes to offensive weapons. As everyone who is part of the charity Lives Not Knives knows - they change lives.