Question: Which one of Whistl's competitors was originally known as the Home Delivery Network?

Context paragraphs:
Health First: Health First is a not-for-profit community health system located in Brevard County, Florida.  The fully integrated delivery network (IDN) is led by President/CEO Steven P. Johnson.  Founded in 1995, Health First operates four hospitals—Cape Canaveral Hospital, Holmes Regional Medical Center, Palm Bay Hospital and Viera Hospital—and is home to the county's only Level II Trauma Center.  Health First also includes Health First Health Plans, which offers a variety of health insurance options across Central Florida, and Health First Medical Group, a multi-specialty physician group.  Health First also offers outpatient and wellness services, including fitness centers, home care, hospice care and aging services.

Content delivery network interconnection: Content delivery network interconnection (CDNI) is a set of interfaces and mechanisms required for interconnecting two independent content delivery networks (CDNs) that enables one to deliver content on behalf of the other.  Interconnected CDNs offer many beneﬁts, such as footprint extension, reduced infrastructure costs, higher availability, etc., for content service providers (CSPs), CDNs, and end users.  Among its many use cases, it allows small CDNs to interconnect and provides services for CSPs that allows them to compete against the CDNs of global CSPs.

Salts Healthcare Ltd: Salts Healthcare has a network of customer care centres that provide home delivery of all stoma and incontinence products.  These centres also provide advisors and stoma care nurses to support their prescription customers.

Takeaway.com: Takeaway.com, officially Takeaway.com BV, and created originally under its Dutch name Thuisbezorgd.nl, is a Dutch dot-com company specialised in online food ordering and home delivery.  Takeaway.com is an intermediary online portal between the customer and the restaurants, where customers can order food online from restaurants’ menus, and have it delivered by the restaurants directly to their home.

Mini truck: Mini truck, also called a micro-truck, are tiny but practical light trucks, available in RWD or 4WD version, originally built to satisfy the Japanese "keijidōsha" (軽自動車) statutory class of light vehicles.  Generally they fall under sub 1000cc engine category.  These vehicles find their use in intra-city low tonnage cargo delivery, like postal and courier services or home delivery of appliances from dealer to the customer i.e. light loads over short distances.

Akamai Technologies: Akamai Technologies, Inc. is an American content delivery network (CDN) and cloud services provider headquartered in Cambridge, Massachusetts, in the United States.  Akamai's content delivery network is one of the world's largest distributed computing platforms, responsible for serving between 15% and 30% of all web traffic.

Divco: Divco was a brand name of delivery trucks built and marketed in the United States.  Divco is an acronym which stands for Detroit Industrial Vehicles COmpany.  Divco became known for its multi-stop delivery trucks, particularly in use as home delivery vehicles by dairy producers.  From 1926 until 1986, Divco produced trucks of various sizes and job descriptions.

F. Thomson Leighton: Dr. Tom Leighton co-founded Akamai Technologies in 1998 and served as Akamai’s Chief Scientist until he became its CEO in 2013.  Under Dr. Leighton’s leadership, Akamai has evolved from its origins as a Content Delivery Network (CDN) into one of the most essential and trusted cloud delivery and cybersecurity platforms, upon which many of the world’s best brands and enterprises build and secure their digital experiences.  During his initial four years as CEO, Akamai’s revenue and profit grew by 70%, and annual revenue from Akamai’s security business grew 15-fold to more than $400 million per year.

Yodel (company): Yodel is a delivery service company in the United Kingdom and is one of the largest couriers along with Royal Mail.  It was originally known as the Home Delivery Network until it acquired the B2B and B2C operations of DHL Express UK and thereafter, re-branded itself as Yodel in May 2010.  It is privately owned by the billionaire Barclay Brothers.

Whistl: Whistl, formerly TNT Post UK, is a postal delivery company operating in the United Kingdom.  The company primarily competes with UK Mail, UPS, Parcelforce, DHL, Hermes, Royal Mail and Yodel.  It processes about 25% of the UK's mail, amounting to over 4 billion items per year in 2015.

Supporting paragraphs: Whistl Yodel (company)
Answer: Yodel