That would be one of the HAS1 Whirlwinds embarked on HMS Protector back in the mid 1950's for Antarctic research. XA870 was one, and is currently at Aeroventure, Doncaster.
Later in the year 'HMS Protector', the Royal Navy's Ice Patrol Ship was due to sail for the first time with helicopters embarked. XA870 was one of the two chosen helicopters for this task., but was painted in the standard RN scheme of Extra Dark Sea grey over sky. Admiralty decreed that they could not operate in Antarctica in these colours and that the two helicopters must carry the high visibility red scheme. Due to the very short time left, it was not possible to obtain the correct paint and so the next best available was "target towing orange'. As a result the two aircraft were painted in this light orange colour with the contrasting black tops.
This hasty decision over time, became a tradition that the Ice Patrol Ship's helicopters would carry orange high visibility markings. Whilst red remained the normal colour of high visibility for other Royal Navy Search and Rescue units. This distinction carried on for many years until 1976 when the last Whirlwind was withdrawn from RN service.
It is believed that XA870 is the first helicopter to have landed on the Antartic Continent. the code number '911' was used only on board the 1955/56 trip and the following year XA870 was also aboard recorded '911'.
The penguin 'nose art' was painted by one of the crew on board 'HMS Protector' as they sailed south in 1955, and another two different designs of the penguin art were seen on later trips. XA870 did not go to the Antarctica after the 1956/57 trip, but remained with the HMS Protector flight at Lee-on-Solent for 'working up' until struck off charge late in 1966.
Airfix did a model of it back in the 1960's, which shows the pop out floats before inflation, plus a perspex dome over what is probably a homing antennae on the tailboom:
From the body language of the two in the foreground, looking at the floats, I would surmise that the inflation was "a bit of finger trouble, Chief"
(edit) a photo of XA868 as one of Protector's Ships Flight while in the Falklands:
and XA866 on the Antarctic
