Could be a poor connection between the fuse and its holder inside the plug. Replaced one at my in-laws place where the live pin had a bit of a wobble and over the years it has been causing arcing leading to the contacts becoming more carbonised which probably over time would lead to increased resistance and heat.
Cheers for the reply! Have changed the plug after trimming the cable and all appears fine, keeping an eye on it and installing a smoke alarm as well as not putting it on when we are not about...
Could be a poor connection between the fuse and its holder inside the plug. Replaced one at my in-laws place where the live pin had a bit of a wobble and over the years it has been causing arcing leading to the contacts becoming more carbonised which probably over time would lead to increased resistance and heat.