Gas supply had to be isolated at fire in Boston.

A FIRE on Horncastle Road, Boston, is believed to have been deliberately started, say Fire and Rescue.

At 12.38pm today (Tuesday), two crews from Boston were called to the blaze in the outhouse of a detached house.

The fire caused severe damage to 50 per cent of the contents of the outhouse.

Fire and Rescue also isolated the gas supply before the incident was left with a National Grid employee.