SQL & PL/SQL

morning folks

does anyone know how to insert the '&' character via SQL plus
without there being a prompt for variables?

i created this test table...
create table x(a varchar2(40));

this causes a prompt to appear in sqlplus when i issue...
insert into x values ('fish & chips');

this dosn't but its a bit messy...
insert into x values ('fish '||'''&'''|| ' chips');

any easy way of switching this prompt off?

kind regards

Satnam