New Hardtail MTB for girlfriend circa £700

Hi, new forum member and looking to buy my girlfriend a new Hardtail MTB for around £700. Can't really try many as we live apart and it will lose the 'surprise' element of the gift anyhow! The two that i've seen that are still in stock are the Liv Tempt 1 at £729 and the Boardman MHC 8.6 at £700. Not sure which is the better of the two, typical ride is 2-3 hours along a mix of gravel tracks, muddy towpaths and roads. Any advice or suggestions welcome, thanks!