The school's primary contribution to linguistics has been the situational theory of meaning in semantics (the dependence of the meaning os a linguistic unit on its use in a standard context by a definite person; functional variations in speech are distinguished on the basis of typical contexts) and the prosodic analysis in phonology (the consideration of the phenomena accruing to a sound: the number and nature syllables, the character of sound sequences, morpheme boundaries, stress, and so on.
The distinctive function is considered to be the primary function of a phoneme. The London School rejects the concepts of the speech of the individual person; it is subject to terminological and methodological inaccuracy and proves in many aspects to be linguistics of speech and not language.