Does a sprung base make a firm mattress feel softer?

Hi Pauline,
 
A pocket sprung base will soften the overall feel of a mattress. Some mattresses are designed to go on these bases, like our Artisan range, and putting them on a sprung base gives the true feel of the mattress. It is fine to put mattresses that are designed for sprung bases onto a platform base but it will firm up the feel. Putting a mattress that is designed for a platform base onto a sprung base will give it a softer feel.
 
Your daughter's mattress is a medium (level 3 at Bensons) and as they don't state the spring tension I assume that it is a medium tension as well which would mean that you are getting the correct support from it. If they bought the complete bed from Bensons then it is on a platform base to give it it's true feel.  This mattress is also a one-sided mattress which means you can not prolong the life span of the mattress by regularly turning the mattress.
 
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As you are both side sleepers and you found your daughter's medium mattress firm you may want to consider something that is soft in the upholstery but that still has a medium spring tension to give you both the correct level of support. Our softest natural fibre mattress is our Artisan Luxury. If you prefer a firmer feel then putting a medium mattress such as the Artisan Bespoke 004 onto your sprung base would be the way to go.
 
I hope this is helpful and if you would like any further information please do not hesitate to contact the office on 0161437 4419.
 
Kind Regards 
Michaela