7 , ▁the ▁regiment ▁reform ed ▁at ▁Reading ▁as ▁ 4 8 0 th ▁( B erk shire ) ▁He avy ▁Anti - A ircraft ▁Regiment ▁in ▁ 7 3 ▁AA ▁B de ▁( the ▁w art ime ▁ 4 7 ▁AA ▁B de , ▁based ▁in ▁Reading ). ▁AA ▁Command ▁was ▁dis band ed ▁on ▁ 1 0 ▁March ▁ 1 9 5 5 ▁and ▁there ▁were ▁wh oles ale ▁am alg am ations ▁amongst ▁its ▁units . ▁ 4 8 0 th ▁H AA ▁Regiment ▁merged ▁with ▁ 5 3 6 th ▁( Sur rey ) ▁Light ▁Anti - A ircraft / Search light ▁R gt ▁and ▁ 6 4 5 th ▁( B uck ingham shire ) ▁L AA ▁R gt ▁( former ly ▁the ▁ 1 st ▁Buck ingham shire ▁( TA ) ▁Battalion ▁of ▁the ▁Oxford shire ▁and ▁Buck ingham shire ▁Light ▁Infantry ) ▁to ▁form ▁P ▁( B erk shire ▁and ▁Oxford shire ) ▁B atter y ▁in ▁a ▁new ▁ 4 3 1 st ▁Light ▁Anti - A ircraft ▁Regiment , ▁with ▁H Q ▁remaining ▁at ▁Reading . ▁ ▁Another ▁round ▁of ▁mer gers ▁in ▁ 1 9 6 1 ▁saw ▁ 4 3 1 st ▁L AA ▁R gt ▁absor bed ▁by ▁ 2 9 9 th ▁( Ro yal ▁Buck ingham shire ▁Ye oman ry , ▁Queen ' s ▁O wn ▁Oxford shire ▁H uss ars ▁and ▁Ber k shire ) ▁Field ▁Regiment , ▁in ▁which ▁R ▁( B erk shire ) ▁B atter