So After quite a bit of experimentation I have accomplished this

I created a new Macro and added two Parameters

• NewsPicker of type Content Picker
• NewsItems of type numeric

Then added a new MacroPartial with the following code

@inherits Umbraco.Web.Macros.PartialViewMacroPage
@if (Model.MacroParameters["NewsPicker"] != null)
{
    var newsNode = Umbraco.Content(Model.MacroParameters["NewsPicker"]);
    int postLimit = Convert.ToInt32(Model.MacroParameters["NewsItems"]);
    <div class="container">
        <div class="row">
    @foreach (var post in newsNode.Children.Take(postLimit))
    {
            <div class="col-sm-6">
                <div class="content equal">
                    <a href="@post.Url">
                        <div class="date">@post.CreateDate.ToLongDateString()</div>
                        <h2>@post.Name</h2>     
                        <p>@Umbraco.Truncate(post.Introduction, 240, true)</p>
                    </a>
                </div>
            </div>
    }
        </div>
    </div>
}

Then in your grid you can insert a macro select your new macro and use the content picker to select your blog page obviously this will need some styling etc but should be enough to get people started. no doubt this has been documented somewhere else and I was just being dense but hopefully it helps someone.

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