WordPress is only showing excerpts, not the full blog post

I have installed wordpress onto my 1and1 service, and have set up the blog to link with my existing one. All of the posts appear as excerpts on the wordpress page https://www.trainingreality.co.uk/wordpressblog/ but if you click through to the entries, only the excerpt shows. The non-wordpress blog is at https://www.trainingreality.co.uk/blog.php .

I would like to have the wordpress version with the full blog contents, but am not sure how to do this.

Many thanks, Simon.