diff --git a/README.md b/README.md
index b73dbbf..c646592 100644
--- a/README.md
+++ b/README.md
@@ -1,14 +1,14 @@
-# Presentation to Energy@Cambridge Good Energy Project
-## 2018 Jan 30
+# Presentation to the British Association for the Study of Religion
+## 2018 Sep 04
 
-This presentation uses [remark.js](https://github.com/gnab/remark).
+This presentation was built using [remark.js](https://github.com/gnab/remark)
+
+Examples of other presentations by me which have been built using other js-based platforms, includes [reveal.js](https://github.com/kidwellj/presentation-20170913-employability) and [impress.js](https://github.com/kidwellj/presentation-20170120-comm_anchors).
 
 A live version of these slides can be viewed via my website at [https://jeremykidwell.info/files/presentations/presentation_20180130_cambridge_energy.html]
 
-In the `atenergy_data` folder:
+In the `data` folder:
 
-* `laudatosi_awareness.png` - a cropped version of an image (`GWGraph4.jpg` is the original) from “[Speaking Out on Global Warming: Public Attitudes toward the Papal Encyclical on Climate Change](http://www.apnorc.org/projects/Pages/speaking-out-on-global-warming-public-attitudes-toward-the-papal-encyclical-on-climate-change.aspx)”. Copyright by Associated Press-NORC Centre for Public Affairs Research.
-* `laudatosi_views.png` - a cropped version of an image (`GWGraph3.jpg` is the original) from “[Speaking Out on Global Warming: Public Attitudes toward the Papal Encyclical on Climate Change](http://www.apnorc.org/projects/Pages/speaking-out-on-global-warming-public-attitudes-toward-the-papal-encyclical-on-climate-change.aspx)”. Copyright by Associated Press-NORC Centre for Public Affairs Research.
 * `ppri.png` a cropped version of an image from Daniel Cox, Juhem Navarro-Rivera, Robert P. Jones, “[Believers, Sympathizers, & Skeptics: Why Americans are Conflicted About Climate Change, Environmental Policy, and Science](http://publicreligion.org/research/2014/11/believers-sympathizers-skeptics-americans-conflicted-climate-change-environmental-policy-science)” by PPRI/AAR. 21 Nov 2014. Copyright Public Religion Research Institute (PRRI)
 
 Any other files are copyright by me, Jeremy Kidwell. But please re-use them as they are covered by [Creative Commons Attribution 4.0 International Licence (CC BY 4.0)](http://creativecommons.org/licenses/by/4.0).
\ No newline at end of file
diff --git a/ordnance_survey_parse.R b/ordnance_survey_parse.R
new file mode 100644
index 0000000..2aa4117
--- /dev/null
+++ b/ordnance_survey_parse.R
@@ -0,0 +1,58 @@
+require(sqldf) # using sqldf to filter while loading very large data sets
+require(data.table)
+require(sf) # new simplefeature data class, supercedes sp in many ways
+require(osmdata) # for loading data from OSM, supercedes "overpass" package and "osmar"
+
+setwd("/Users/kidwellj/gits/presentation-20180904-basr")
+
+# Import filtered CSV, selecting only data
+# Note: OS recently changed column names to remove underscores, dropping header simplifies this issue
+pointx_201512 <- read.csv.sql("/Volumes/imac-storage1/GIS_data/Ordnance_Survey/PointX_Complete_2015_12/poi_2015_12_all06340459.csv", sql = "select * from file where V3 = '06340459'", header = FALSE, sep="|")
+pointx_201806 <- read.csv.sql("/Volumes/imac-storage1/GIS_data/Ordnance_Survey/PointX_Complete_2018_06/poi.csv", sql = "select * from file where V3 = '06340459'", header = FALSE, sep="|")
+# pointx_201409 <- read.csv.sql("/Volumes/imac-storage1/GIS_data/Ordnance_Survey/PointX_Complete_2014_09/Data/pointx_v2_National_Coverage_Sept14.txt", sql = "select * from file where V3 = '06340459'", header = FALSE, sep="|")
+# pointx_201609 <- read.csv.sql("/Volumes/imac-storage1/GIS_data/Ordnance_Survey/PointX_Complete_2016_09/csv/pointx_v2_National_Coverage_Sept16.txt", sql = "select * from file where V3 = '06340459'", header = FALSE, sep="|")
+
+# Filter out the distorting uncategorised category
+plot(sort(table(pointx_201806$V26[pointx_201806$V26 !='"Not Identified (Christian)"'])))
+
+# Calculate a descending sorted list of points by each denomination for 2015, and filter out distorting "not identified" category
+denominationcounts_201512 <- (sort(table(pointx_201512$V26[pointx_201512$V26 !='Not Identified (Christian)']), decreasing = TRUE))
+par(las=2) # make label text perpendicular to axis
+par(mar=c(12,8,4,2)) # increase y-axis margin.
+par(cex.axis=0.7)
+par(cex.lab=1)
+# Subset top 10 for plot
+plot(denominationcounts_201512[1:15])
+
+# Calculate a descending sorted list of points by each denomination for 2018, and filter out distorting "not identified" category
+denominationcounts_201806 <- (sort(table(pointx_201806$V26[pointx_201806$V26 !='"Not Identified (Christian)"']), decreasing = TRUE))
+par(las=2) # make label text perpendicular to axis
+par(mar=c(12,8,4,2)) # increase y-axis margin.
+par(cex.axis=0.7)
+par(cex.lab=1)
+# Subset top 10 for plot
+plot(denominationcounts_201806[1:15])
+denominationcounts_201806
+
+# Get UK Admin polygons
+if (dir.exists("data") == FALSE) {
+  dir.create("data")}
+download.file("https://borders.ukdataservice.ac.uk/ukborders/easy_download/prebuilt/shape/infuse_dist_lyr_2011_clipped.zip", destfile = "infuse_dist_lyr_2011_clipped.zip")
+unzip("infuse_dist_lyr_2011_clipped.zip", exdir = "data")
+admin_uk <- st_read(infuse_dist_lyr_2011_clipped)
+fname <- system.file("data/infuse_dist_lyr_2011_clipped.shp", package="sf")
+admin_uk <- st_read(fname)
+
+# Make maps
+# Define CRS for British National Grid
+BNG = "+proj=tmerc +lat_0=49 +lon_0=-2 +k=0.9996012717 +x_0=400000 +y_0=-100000 +datum=OSGB36 +units=m +no_defs +ellps=airy +towgs84=446.448,-125.157,542.060,0.1502,0.2470,0.8421,-20.4894"
+xy <- pointx_201806[,c(4,5)]
+pointx_201806_map <- SpatialPointsDataFrame(coords = xy, data = pointx_201806,
+                                            CRS("+proj=tmerc +lat_0=49 +lon_0=-2 +k=0.9996012717 +x_0=400000 +y_0=-100000 +datum=OSGB36 +units=m +no_defs +ellps=airy +towgs84=446.448,-125.157,542.060,0.1502,0.2470,0.8421,-20.4894"))
+
+churches_ordnancesurvey_2018 <- st_read(pointx_201806)
+sf("OS_pointX_2016_09-POW-UK_all-simplified.csv")
+coordinates(churches_ordnancesurvey) <- c("FEATURE_EASTING", "FEATURE_NORTHING")
+proj4string(churches_ordnancesurvey) <- proj4string(admin_uk)  # borrow BNG CRS from admin boundaries shapefile
+
+