Vowels
British English (BBC accent) is generally described as having short vowels, long vowels and diphthongs. There are said to be seven short vowels, five long ones and eight diphthongs.

Short vowels:
pit pet pat putt pot put another
ɪ e æ ʌ ɒ ʊ ǝ ǝ

Long vowels:
bean barn born boon burn
iː ɑː ɔː uː ɜː

Diphthongs:
bay buy boy no now peer pair poor
eɪ ai ɔɪ ǝʊ aʊ ɪǝ eǝ ʊǝ

Consonants
Plosives:
p b t d k g
pin bin tin din kin gum

Affricates:
ʧ ʤ
chain Jane

Fricatives:
f v θ ð s z ʃ ʒ h
fine vine think this seal zeal sheep measure how

Nasals:
m n ŋ
sum sun sung

Approximants:
l r w j
light right wet yet

Source: A little encyclopedia of phonetics, Peter Roach, Professor of Phonetics, University of Reading, UK. (pdf)