Meghan Markle's enraged sister en route to London for royal showdown

Meghan Markle may be in for the quite the surprise, as her half sister Samantha is travelling to London with her publicist.

The half-sister of the Duchess of Sussex has been in Italy, and her publicist revealed on Monday that the pair were not quite ready to head back to the States, reports the Daily Mail.

"Samantha Markle is coming to the UK. After making numerous attempts in private to arrange a one on one meeting with The Duchess of Sussex to discuss their 74 year old father's health, Kensington Palace have refused to respond (sic)," wrote Rob Cooper on Twitter.

"I fear Meghan may not be made aware of these discreet attempts and therefore making this public is the only option we have left. I currently have Samantha in Europe with just one short flight away.

"This DOESN'T need to be public, we would prefer to keep this private. Samantha is coming to the UK this week, like it or not."

Samantha Markle is coming to the UK. After making numerous attempts in private to arrange a one on one meeting with The Duchess of Sussex to discuss their 74 year old father’s health, Kensington Palace have refused to respond. I fear Meghan may not be made aware of these discreet pic.twitter.com/ZaypdSWEib

— Rob Cooper (@RobCooperPR) September 24, 2018

(cont) attempts and therefore making this public is the only option we have left. I currently have Samantha in Europe with just one short flight away. This DOESN’T need to be public, we would prefer to keep this private. Samantha is coming to the UK this week, like it or not.

— Rob Cooper (@RobCooperPR) September 24, 2018

This comes just over a week after she went on a furious social media tirade about her sister and her new husband.

Branding the Duchess The Ducha**", she slammed Prince Harry on his 34th birthday, saying: "Happy Birthday Harry! As you 'Mack down' on your birthday cake, think about the birthday wishes you never extended to your FATHER-IN-LAW."

In a separate post, she fumed: "I am not candy coating anything anymore!

"The DUCHA** should be humane to our father who has given her everything and this media crap can stop!

"He was the one who was always there for her. Fake waves and smiles can stop. The duchA** can bow to the daddy".

At one point during her rant Markle proclaimed that the Duchess of Sussex "wasn't much different than Trump".

"Sorry folks there is no valid or a good argument in favor of inhumane treatment of both sides of the family and a best friend of 30 years," Ms Markle tweeted last week.

"Snobbery and arrogance are not humanitarian traits. She has an obligation especially to treat our father with kindness."

"She is not a nice person. It is all an act. Nice people don't dump everyone...It's a habit…actually it is an MO she disowns everyone after they are spent," she added.

Ms Markle changed her last name from Grant to the same as her half sister's when the now Duchess began dating the Prince of Wales.

Today Meghan was seen playing netball with students on an official visit with her husband to the University of Loughborough.