This safe would be a good choice as it offers 60 minutes fire protection while boasting a £10,000 cash rating (eurograde 1). If the security level is too high based on your preference for fire protection you could also consider the Burton Firesec 4/60 Size 3. This safe also includes 60 minutes fire protection but has a lower security level with a £4,000 cash rating. This is an excellent safe and is less than half the cost. To be certain regards size we would need to know the measurements of the items you intend to store.

The fixing bolt supplied with this safe is 180mm in length. Providing this can anchor it the concrete this should be possible and is more secure than trying to affix to wood only.