Can anyone help with roses?

[UniversalTruth]

We have a lovely yellow rose planted by previous owner - still has tag so I know it's a bush rose. It hasn't been pruned well (including by us) so now it is a thick brown stem (inch plus) with all growth and therefore flowers about 6ft up. If I hack it back to near the ground will it goes new shoots to look like a proper bush? When should I hack it? Happy to forgo flowers for a time if it makes a better plant!

*grow not goes

RHS I confess I'm a hack it back to a few potential shoots kind of gardner, if it doesn't look good as is. I go for a hard prune, give it a season and if its not showing potential that it can be trained/ shapped/ look good time for something new.

Once the flowers have died back this year, prune it back to;
Three/four shoots around 9 inches long, in a sort of goblet shape. Prune to above an outward facing bud.

If you only have one shoot, prune it back to a place above the graft, if there is a graft. Make sure you prune it above a bud that is pointing in the direction you want the plant to grow.

Thanks ripple - I am really tempted to hack it and see but my MIL loves it so I'd hate to kill it and upset her! But seeing as I know which it is I guess I can always get a new one! RHS link says I have until February to decide anyway

alternative how low would the graft be if there is one? There's knobbly bits about a foot above soil level that I'm worried are graft but don't know what I'm looking for

What variety is it? What is on the tag? You can usually tell whether it has been grafted by seeing if it is usually sold as a grafted variety. Yes there will be a knobbly bit.

Also take a good pic of the bottom 2 feet of the plant for us.

It's Graham Thomas. I don't think it's grafted - label doesn't say it is and I've just checked and there's no knobbly bits below bottom branch. What do you think? Can I hack it??? not desperate to hack, no

The best time to prune roses is February, around Valentine's Day. I'd go easy and take it back gradually each year until it's the height you want.. Hopefully that will encourage it to produce more branches lower down the trunk.

If you take the top off in mid-summer, once the current flush of flowers have finished, it will probably flower again a few weeks later. Make a slanting cut about 1cm above an outward-facing bud at a leaf joint.