Block from U+10450 to U+1047F. This block was introduced in Unicode version 4.0 (2003). It contains 48 codepoints.
The Wikipedia provides the following information on block Shavian:
Shavian is a Unicode block containing characters of the Shavian alphabet (also known as the Shaw alphabet), an orthography invented to write English phonetically and funded by the will of George Bernard Shaw. The Shavian block was derived from an earlier private use encoding in the ConScript Unicode Registry, like the Deseret and Phaistos Disc encodings.