motorola f3 mobile phone costs £15 or so.

Mobile seems a better option for on-call techs

I get phone rental paid as unfortunately I have very poor mobile reception at my home.

We're just greedy and have both the line rental paid and a mobile phone each. The government tarrif if £5 per month so it costs my budget 360 a year. A quid a day and no complaints from the management...must be a first