Mandarin Chinese has several differences in terms of pronunciation compared to British English, including differences in tone, vowel sounds, and consonants.

Tones: Mandarin is a tonal language, meaning that the meaning of a word can change depending on the tone used to pronounce it. There are four main tones in Mandarin, while English is a non-tonal language.

Vowels: Mandarin has fewer vowel sounds compared to English, and the vowel sounds are pronounced differently. For example, Mandarin has only one basic vowel sound, while English has multiple vowel sounds.

Consonants: Mandarin has a smaller set of consonant sounds compared to English, and some of the consonant sounds are produced differently. For example, Mandarin does not have the "r" sound, and the "j" sound is produced differently compared to English.

Intonation: Mandarin has a rising and falling pitch pattern in its intonation, while English has a more varied intonation pattern. This difference in intonation can make it challenging for Mandarin speakers to achieve the correct intonation in English.

In general, Mandarin sounds tend to be produced with less movement of the lips and tongue, and more movement of the larynx, compared to English sounds. As a result, Mandarin speakers may need to adjust their pronunciation and use of the mouth and speech organs when speaking English.

In general, Mandarin sounds tend to be produced with more movement of the tongue than English sounds, and some Mandarin sounds require the use of the back of the mouth and the pharynx. Additionally, Mandarin has four distinct tones, which are used to convey different meanings for words with the same pronunciation, and this can make it challenging for English speakers to produce the correct sounds in Mandarin.

Some Mandarin sounds, such as the retroflex sounds represented by the characters "zh," "ch," "sh," and "r," are produced by curling the tongue back towards the roof of the mouth and narrowing the space between the tongue and the roof of the mouth. These sounds require the use of the back of the mouth and the pharynx. In Mandarin, some of the sounds are pronounced by pushing air out from the throat, this is also known as pharyngealization, which is achieved through the use of the pharynx. These sounds tend to be pronounced with more tension in the throat and with a more resonant, guttural quality.