convert gas fire to a wood burning insert?

[phelix]

Our home was built in the late 80s. It has an external chimney that's about 50cm deep and 110cm wide on the outside of the house and it then tapers to 60cm wide as it goes up to past the roof. Inside is a monster of a brick and tile hearth (1.8m wide and 50cm deep) and there's a small (40cm wide) gas fire all but lost in the middle. The back of the fire looks to be a pre-formed set of cast concrete-like pieces one of which is labelled "baxi". The flue goes up very near the front The chimney and hearth are ludicrously large for the gas fire but so be it. We would ike a glass fronted wood burning insert, perhaps 80 or 90cm wide. Having grown up with a fireplace with a crackling fire almost every evening in the winter I miss it - the gas fire gives off some heat but does little for the visuals. So my question is - what is the likelihood that we can install such an insert without major works on the chimney? An example is http://morso.co.uk/product/morso-s80-90/ Happy to get rid of the hearth and replace it with something much more minimalist.