1916 : These 16 colonies were increased to 46, with the help of imported Ligurian queens.
No trace of any disease could be observed after the demise of the Native

1917 : In response to a request by the Government we increased our colonies to one-hundred. The needed queens were raised from stock that survived the winter 1915 – 1916.

1918 – 1919 : During these two years hundreds of nuclei were sent out to all parts of the British Isles, to make good the losses caused by the Isle of Wight epidemic.
The required queens were raised from stock that survived the epidemic. Among the queens raised in 1919 was one that embodied all the desirable qualities of the Ligurian and former Native in an ideal combination. Indeed this particular queen was duly registered as Breeder No. B-1 and the progenitor of the present-day strain.

1920 : Close on hundred daughters of breeder No. B-1 were raised in 1920. Also a similar number of an imported queen from Nicosia, Cyprus.

1921 : Daughters of breeder No. B-1 surpassed all expectation in 1921.

1922 : Two daughters of breeder No. B-1 were used as breeders in 1922. As would happen one – No. B-2 – proved exceptionally resistant to Acarine; her sister, No. B-3, extremely susceptible. Indeed so much so that hardly any colonies headed by her daughters survived the winter 1922 – 1923.

1923 – 1924 : Used breeder No. B-2 almost exclusively during these two years. However in 1924 a limited number were raised from a breeder W. Herrod-Hempsall brought back from the U.S.A. in 1923. This strain was reputed to be superior to any other in North America.

1925 : Breeder No. B-4 = .24 – B-2 x ?
Breeder HH = .24 – HH x ?
Drones : Daughters of breeder No. B-2 ; GP.= .19 – No. B-1. x N.N.

1926 : Breeder No. B-4 = .25 – B-4 x B-2
Breeder No. HH = .25 – HH x B-2
Drones : Daughters of breeder No. B-4 ; GP.= .24 – No. B-2 x N.N.

1927 – 1928 : Breeder No. B-278 = .25 – No. B-4 x B-2
Drones : Daughters of breeder No. B-4 ; GP.= .25 – No. B-4 x B-2

……..

Notes:
The Mating Station was established on June 1st 1925.
All the queens prior to 1925 were mated at random.

Acarine:
Breeder No. B-3, whose progeny proved so extremely susceptible to Acarine; was immediately eliminated.
So also all HH queens subsequent to 1926. Their extraordinary susceptibility was reconfirmed in 1959, following a further importation of queens of this same strain from the U.S.A. in 1958.

Breeders:
The breeders used during this initial period, that did not prove of any special value or interest, are not recorded.