Here is the top part of the code:

@inherits Umbraco.Cms.Web.Common.Views.UmbracoViewPage<ContentModels.PropertyListing>;
@using ContentModels = Umbraco.Cms.Web.Common.PublishedModels;
@using System.Linq;
@using System.Linq.Expressions;
@using System.Web;
@using System.Collections.Specialized;
@using Galbraithv13v2.Services.PropertySearch.Models;
@using Galbraithv13v2.Services;
@using Galbraithv13v2.Extensions;
@inject ISiteService SiteService;
@inject Microsoft.AspNetCore.Http.IHttpContextAccessor HttpContextAccessor

@{
    IPublishedContent globalContent = SiteService.GetSettingsNode();
    var globalSettings = globalContent.FirstChild<Settings>();
    var primaryFilterSize = Model.sq.Channel == PropertyChannel.ForestryAndWoodland ? "sm" : null;
    var Request = HttpContextAccessor.HttpContext.Request;
}

<div class="property-filters-container">
    <div class="property-search-filters @primaryFilterSize" id="searchForm" data-api-key="@globalSettings.GoogleMapsKey" data-channel="@Model.PropertyChannel" data-region-id="@Model.sq.RegionId">
        <div class="container primary-form">
            @if ((int)Model.sq.Channel != 3)
            {
                <div class="listing-type">
                    <label class="custom-input" for="toBuy">
                        @Html.RadioButtonFor(model => model.sq.BuyOrLet, true, new { @class = "sr-only", @id = "toBuy" })
                        <span class="radio-button"></span>
                        To Buy
                    </label>
                    <label class="custom-input" for="toLet">
                        @Html.RadioButtonFor(m => m.sq.BuyOrLet, false, new { @class = "sr-only", @id = "toLet" })
                        <span class="radio-button"></span>
                        To Let
                    </label>
                </div>
            }

The issue I am having is that this worked fine in version 8 of Umbraco but now the LINQ statements are not working, they don't seem to access the model content unless using @model instead of inherit but Umbraco then breaks all over if you do that.

I'm a bit stuck as the other Model. references work just fine

@Html.RadioButtonFor(m => m.sq.BuyOrLet, false, new { @class = "sr-only", @id = "toLet" })

To reiterate, this worked in V8 with almost the exact same code, now it doesn't in 13. Any help is appreciated!