Research & Conservation Officer @WildTroutTrust; Prof in Practice @LancsUniLEC; Fellow @freshwaterbio; Aquatic Ecologist
Joined March 2012
- Tweets 12,490
- Following 225
- Followers 2,838
- Likes 7,993
1,879 Photos and videos
Pinned Tweet
20 Oct 2023
Using #StormBabet to assess recent #floodplain reconnections funded via @EnvAgencyYNE #Fishery Improvement Prog & Upper Aire Project #UAP
1: Flasby Beck formerly straightened & incised now with lowered banks, reconnected paleochannels & wet, wet meadows
@WildTroutTrust
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Jonathan Grey retweeted
4 Dec 2025
In winter, wild brown trout spawn in rivers across the country. The nests ("redds") can often be seen from the riverbank, but a great way to spot them is from above. Here @ProfJGrey takes us on a tour of a River Aire tributary - how many redds can you see?
youtu.be/gyCl60tIVfY
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Jonathan Grey retweeted
26 Nov 2025
Weston Farm Fishery offers a memorable trout fishing experience on Berkshire's River Lambourn. With our Christmas Raffle, you could win a day's fishing for two on this beautiful chalk stream. Tickets cost £1 and all proceeds support our conservation work: wildtrout.org/shop/products/…
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Jonathan Grey retweeted
11 Sep 2025
2024: Just one young brown trout in 30m of river 🐟
2025: Fifteen fantastic fish! 💙
We're delighted to see such progress in Snaizeholme Beck, after our work to improve the wildlife habitat. Learn more in this brilliant blog from @yorkshire_dales: yorkshiredales.org.uk/skille…
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Jonathan Grey retweeted
6 Nov 2025
We had a spotty surprise on a recent visit to Wensleydale in North Yorkshire. While some of the local rivers have dry periods, we wouldn't usually expect to see one without water in the autumn time. Here, @ProfJGrey encounters a very tenacious fish 🐟
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Jonathan Grey retweeted
20 Nov 2025
Great to see the @WildTroutTrust team @ProfJGrey doing more great work! This “de-knackering” of our rivers and streams is what the team do, with profound benefits.
20 Nov 2025
When we enhance river habitat, we're always looking ahead to future conditions. Like many rivers, the upper tributaries of the Aire were noticeably low this year. But when autumn rain arrives, @ProfJGrey demonstrates the value of reconnecting the rivers to their floodplains 💧
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Jonathan Grey retweeted
30 Aug 2025
PRACTICAL GUIDE TO HEDGELAYING
With Claire Whittle & myself
Learn about our hedges and the benefits to livestock & wildlife.
Then learn the basics of hedgelaying before getting everyone hands on at the hedge
Delicious homemade lunch included
Book here
visitmyfarm.com/online-store
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Jonathan Grey retweeted
7 Aug 2025
Our @ProfJGrey has been busy surveying fish species in several Yorkshire rivers, teaching students about the value of long-term monitoring. By assessing fish populations before and after habitat enhancement works, we get a clearer picture of each project's impact 🐟
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Jonathan Grey retweeted
28 Aug 2025
We've been back in lovely Cumbria for more habitat assessments! 🐟@ProfJGrey has been advising on the Penrith to Kendal Arc Landscape Recovery Project, this time on the River Sprint. This is a fantastic landscape, with lots of potential to improve the health of its rivers.
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Jonathan Grey retweeted
11 Aug 2025
So excited to be able to help. DM ideas and suggestions, I’m all 👂as I engage with our wonderful team, volunteers and stakeholders
11 Aug 2025
We’re delighted to share that Simon Francis is joining us as the new Chairman of our Board of Trustees. He brings incredible business acumen and a passion for protecting rivers and wild trout. Follow him @Chairman_WTT and read more here: wildtrout.org/news/wild-trou…
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7 Aug 2025
Little wonder the River Sprint is sprinty! Historic & maintained channel realignment & straightening serves only to keep it conveying water at its sprintiest pace d/s to Kendal....
@WildTroutTrust exploring opps to unshackle & re-engage the floodplain #SlowTheFlow #restoration
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Jonathan Grey retweeted
30 Jul 2025
New research from PesticdeActionNetwork reveals the extent of pesticide use by UK councils. These are poisons being sprayed in your street, your local park. Pls share.
For links to the full report & to find out what you can do, follow the link below
pan-uk.org/pesticide-free/
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Jonathan Grey retweeted
30 Jul 2025
We had a terrific time at our recent Trout in the Town Conclave! This annual event brings together urban river advocates from across the country, to share knowledge and inspiration. Recap here and recordings of the keynote presentations will be live soon: wildtrout.org/wttblog/trout-…
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Jonathan Grey retweeted
17 Jun 2025
Before: an artificially straight, steep, redirected river that was prone to flooding and bank erosion 👎
After: a more natural channel that boosts biodiversity, stores stormwater, and captures carbon 🐟
How we're improving the Otterburn Beck: wildtrout.org/wttblog/whats-…
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Jonathan Grey retweeted
27 Jul 2025
Took a wander along some of our earliest roadside verge planting & #NoMowMay sites bursting with colour. Rowan were drooping under a berry burden!
#wildflowerhour @BSBIbotany @Love_plants
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Jonathan Grey retweeted
2 Jul 2025
33/60 @QuantumFreshWtr sites in SW & W England and Wales have now been sampled. Next stop N England and Scotland! By focusing on sheep, beef and dairy farmed catchments the national picture we are building of their impacts on UK rivers will help inform better policy & management
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Jonathan Grey retweeted
1 Jul 2025
When wild brown trout were lost from the upper part of the River Mel, a mill prevented the river from being repopulated. Now, our translocation project with @EnvAgency is returning this iconic fish to its native habitat: youtu.be/-qEuc5zFm_I
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Jonathan Grey retweeted
26 Jun 2025
IMPORTANT. Please sign and repost. This petition is based on our recent research which found that English rivers are universally contaminated with these potent neurotoxic insecticides, the source being treated dogs and cats. Link in comment below.
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Jonathan Grey retweeted
25 Jun 2025
It’s #NationalInsectWeek! Insects are essential to ecosystems - pollinating plants, breaking down organic matter, enriching soil & feeding birds, fish & mammals.
Enjoy these pictures from a recent site visit, there were signs of insect life everywhere you looked!🐝 🐜 🐛
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Jonathan Grey retweeted
24 Jun 2025
This should be interesting.
New "study confirms that Glyphosate and Glyphosate-based herbicides cause multiple types of cancer, even at exposure levels deemed to be “safe” by the EU" Register at: zoom.us/webinar/register/WN_…
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Jonathan Grey retweeted
24 Jun 2025
Have you spotted a pollution problem in your local English river? @EnvAgency has a new 24/7 online reporting service. If you see something that you think could be water pollution, please try to let them know by calling 0800 80 70 60 or reporting online: gov.uk/report-water-pollutio…
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