What were two developments for the battle of Britain?

The developments made by the British such as the practical use of radar, the design of sophisticated fighter planes and the overall organization of command and production were unprecedented in the amount of time Britain had to prepare for eventual war with Germany.

Explanation:

i confess that there are several parts of this constitution which i do not at present approve, but i am not sure i shall never approve them: for having lived long, i have experienced many instances of being obliged by better information or fuller consideration, to change opinions even on important subjects, which i once thought right, but found to be otherwise. it is therefore that the older i grow, the more apt i am to doubt my own judgment, and to pay more respect to the judgment of others.