Complex sentence: However, Fairey found the Ministry of Supply unsupportive; the organisation having adopted the prevailing belief being that manned military aircraft would soon be replaced by guided missiles; the firm had great difficulty in obtaining permission for the attempt.
Split into simpler sentences: However, Fairey found the Ministry of Supply unsupportive; the organisation having adopted the prevailing belief being that manned military aircraft would soon be replaced by guided missiles. The company had great difficulty in obtaining permission for the attempt.