Pom Pax - quite possible. As a native, it is only natural that we should fleece the visitors, if possible
In a similar vein, in the 50s, Plymouth Roborough had a D/F facility but it required patience - the D/F hut was (apparently) some distance from the Tower and if a QTE was asked for, the duty chap had to hop on his bike and operate from there! By the time you got the result you had probably lost interest - or gone out of range!